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  1. #1
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    Any Whyte PRST-1, 4 Owners Out there?

    Anybody out there still ride the rare Whyte PRST-1 or the later PRST-4 models? Love the hear from the PRST owners out there about their bike and share feedbacks or modifications they done to this odd duck of a mountain bike design. Own the PRST-1 for couple of years and enjoy it immensely but would love the hear from owners of later PRST-4 with Dual-link (Marin bikes) swingarm out there compared to the single pivot design of the PRST-1.
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    Last edited by fjyang; 09-01-2008 at 03:00 AM.

  2. #2
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    [SIZE=2]I’ve still got my dads old Whyte PRST1 XT race bike from 2001. Its had a real thrashing and it’s just the standard V-brake model but everything apart from the gears work fine. As far as the ride goes I think it’s great, it bobs a little more than most modern FS bikes but I see you have A Fox RP23 rear shock so it doesn’t matter much. Somehow it’s still one if the stiffest and fastest bikes I have, the front can feel a little harsh over bumps but I’ve tried others with air shocks and they feel a lot plusher. Have you noticed the very unique sound you get from the frame on this bike? Rather like carbon frames.

    Sorry about the picture quality, I think my camera was having a bad day…


    [/SIZE]

  3. #3
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    I'd agreed its one of the smoothest and solid feeling front and back bike there is. I'd tackle what little bobing there is on the back end with a RP23 platform shock and the stiff front end with a Fox float but with a AVA air canister so the spring rate is more linear with less air. The Fox AVA front shock make the front feel extra plush and it feel like it has more travel then the 4" stock.

    The only front end noise I feel when the fork compress is from the spherical bearing. I have to be carefull not the tighten it too much or too lose to cure the noise. The great thing about linkage forks is that when it compress, it still maintain frame geometry so unlike traditional forks it wont change from 70d headangle to 74d under hard breaking.

  4. #4
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    Hi, I bought a used Prst-1 frame 6 months ago on ebay.co.uk
    I am buying pieces to complete it but I think I will finish in the next summer....

    I red about Whyte Prst on Mba november 2000 (or 2001?) issue...and I loved it immediately...

    I bought a rear disc brake adaptor in Uk from the distributor; the front adaptor was not more available so I could made one from a pdf file I received from fjyang....a real friend.....thanks!! :-)

    So I will ride it next year and I will post my impressions... :-)

    Da Whyte PRST-1


    Da Whyte PRST-1


    Da Whyte PRST-1



    PS Hi Frank, how are u? What are u building now? :-)
    Last edited by superguzz; 09-11-2008 at 11:54 AM.

  5. #5
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    [SIZE=2]Just a word of warning, we’ve both got the same model that was know to have frame failures, just from looking at the bike I’m sure you can guess where, exactly on the H & Y of Whyte which is not a place you want a bike to break. It’s fortunately a fairly uncommon problem on our early models that was fixed on fjyang’s later model. [SIZE=2]As you can see the front shock mount is slightly different on all the bikes here, mine is the original the broke many times, yours was the second attempt that had a much lower failure rate and fjyang’s bike is the one they got it right with. [/SIZE]I’m just saying this because I know a rider who was injured when it happened, most likely it won’t happen but don’t take too many bigger hits on the front, should be fine on XC and trail riding though.
    [/SIZE]

  6. #6
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    At least now I know there are more then two Whyte PRST-1 owenrs out there ;-) I wonder about the production number of these bikes. The shock mount was an issue from the info I gather but didn't realized there were two design attempts to rectified the issue, maybe you can contact ATB sales in England when and if it fails for a replacement frame. The three different production frames pictured on this thread is what I hope this thread could be.

    The front fork lower shock Fox bushings suppose to wear out pretty fast and Whyte sell a replacement ball bearing bushing kit which is overkill (in a good way) but at least you don't have to worry about that pair of bushings wearing out. I added a small mud flap/fender under the front shock to keep dirt and water away from the shock and I highly recommended. Go ride without a mud fender on a damp day and you'll be suprised how much crap it gathers down there around the front shock.

    Hey Superguzz or as I remember the Italian Architect! ;-) How are you? Hope the disc brake adapter plans work out for you. My bike projects are all over the place but Mrazek FS is my latest creation but at 7 bikes my girl is threaten to leave me so putting on the breaks for now
    Last edited by fjyang; 09-11-2008 at 01:27 AM.

  7. #7
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    I am thinking about the three different ammo links....it's very interesting argoument...mmmmh
    fjyang's bike has the best link...the V3 frame....mmmh...

    @fjyang: yes...the italian architect!! thanks a lot for adaptor diagram....I made two of 6061 alu....next summer my prst will slow down with a pair of disks.... :-)

    good luck, bye

  8. #8
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    Absolutly Addicted

    Yeh, I came across my PRST1 nearly four years ago, I was previously an engineer, and the design will always win over a trad fork, doesn't matter how good a telescopic fork is it doesn't stand a chance, it just goes to show how much looks play a part or this design would have seen off all its competition, thought I would never sell it.... until I was talking to my local Whyte dealer on how the only flaw I saw was that I would regularly jam the chain when selecting the granny ring on steep accents, and he mentioned the PRST4, which had just reached the end of its production life.... but he mentioned that ATB had 4 frames hanging about in their warehouse.... I knew then that one had my name on it!

    New and old!

    Sorry to anyone out there that paid the RRP, I managed to get this brand new babe for a grand with all the warrentees, true it had LX on it (except the 2008 XT brakes) I have since replaced Crank, front and rear mech and changers with 2008 XT, DMR V12 mag peddles and it also came with a rather plush SDG i-beam seat & post, I also swapped my Carbon Easton bars from the PRST1, and on both upgraded both shock bushes to the lifetime ones, and now added a Blackspire bash ring, and tie-wrapped a black mouse mat to protect the rear arm from chain slap

    The only negative I have for this (which is probably the use I make of it) is that I run the sus quite low and that makes the quad like do absolutely nothing, there are only two things I'd like to do to her now, replace the shocks with Fox with remote lockout and upgrade to XTR.... but these are both hyper critical and I am in no rush to do, I have another bike for DH, but to me this bike is the best designed bike ever, no question, I have never had a bad ride on it! ooh the bash ring is due to my sway towards free riding, which this bike also does fantastically (even with only 4" of travel)

    I have stripped both of these bikes several times, so anyone got any questions fire away
    -------------------------
    Whyte PRST 4
    EPX Terrashark
    Specialized Hardrock (Modified)

    -------------------------

  9. #9
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    Hi leshark

    Finally someone out there rides a PRST-4! and you own both PRST-1 & 4 with both bike together in one picture is a rare sight indeed. Does the dual link PRST-4 rear end ride significantely different then the PRST-1 single pivot? Did you buy the bike from ATB directly?

    My PRST-1 rear end bob a bit with the stock Fox float R and a RP23 take care most of issue, supposely with dual link suspensions you don't need a platform shock to control bob. The front end provoke a either love it or hate it reaction but if you're from a engineering or design background, you'll appreciate the design even more. For me its love at first sight with PRST's. The front end track the terrain like no other fork and the feedback just solid and really communicate to the rider what the front end is doing. The latest 32-36mm stanchions forks with 20mm throu axil come close to PRST linkage front rigidity that was design 1999-2000 and I can't imagine what the front end will be like if Whyte have 8 years of developement & refinement to their linkage design?

  10. #10
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    hi, i own a PRST-1 but I have to finish to buil it; so I did not ride it but I am asking the same question.....is PRST-4 better than the 1??
    bye

  11. #11
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    Whyte PRST'S Predecessor

    Hi Guys, I think I found the grand daddy of Whyte's PRST design. Its a company call Muddy-Fox, model Interactive Comp also a British company? The front end design is vary similar to PRST's and I got a feeling that John Whyte got a lot of inspiration from that bike. I'd also inlcude a pic of BMW's Televeler front end mountain bike for comparison.
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    Last edited by fjyang; 11-12-2008 at 04:27 AM.

  12. #12
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    Quote Originally Posted by fjyang
    Hi leshark

    Finally someone out there rides a PRST-4! and you own both PRST-1 & 4 with both bike together in one picture is a rare sight indeed. Does the dual link PRST-4 rear end ride significantely different then the PRST-1 single pivot? Did you buy the bike from ATB directly?

    My PRST-1 rear end bob a bit with the stock Fox float R and a RP23 take care most of issue, supposely with dual link suspensions you don't need a platform shock to control bob. The front end provoke a either love it or hate it reaction but if you're from a engineering or design background, you'll appreciate the design even more. For me its love at first sight with PRST's. The front end track the terrain like no other fork and the feedback just solid and really communicate to the rider what the front end is doing. The latest 32-36mm stanchions forks with 20mm throu axil come close to PRST linkage front rigidity that was design 1999-2000 and I can't imagine what the front end will be like if Whyte have 8 years of developement & refinement to their linkage design?

    Alas no more, I sold the PRST1 to make way for a DH/Jump bike, the rear end is only different if you set them up properly, which is with a relatively high pressure, as you would for X-country, but I use mine more of an all mountain and epic riding, they both ride extremely light, as if they are about 5 lb lighter, I have ridden both on 6+ hour rides without problem, and I am not among the fittest, however I digress, I run then with about 40% sag, this is below the benefit of Quad link, so I really don't notice any improvement, although I never had a problem with bob on the PRST1, the main reason for the upgrade was the chain slap on the chain stay and just couldn't miss the opportunity, I bought it through Bike in Bristol who are White distributors although it came direct from ATB, but you are unlikely to get one now, I bought her in March, and there were 2 left. I really think White have missed a trick, I ride with guys on supposed all mountain bikes (Specialised and Marin) and on tricky down hill switchbacks, rocks (in fact all surfaces) I leave them standing
    -------------------------
    Whyte PRST 4
    EPX Terrashark
    Specialized Hardrock (Modified)

    -------------------------

  13. #13
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    Quote Originally Posted by superguzz
    hi, i own a PRST-1 but I have to finish to buil it; so I did not ride it but I am asking the same question.....is PRST-4 better than the 1??
    bye
    The only difference is the quad link and the rear triangle has no chain stay, although if you can live without the big gripper quick release, and you have a PRST1, look out for an old Marin rear end, that way you can get rid of the chain stay, which caused me grief with chain jam in the granny ring
    -------------------------
    Whyte PRST 4
    EPX Terrashark
    Specialized Hardrock (Modified)

    -------------------------

  14. #14
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    hey FJ, that's called a (modified) Hossack fork, BMW's recently reintroduced them on their high end sportbikes (K1200S or R or something I think?)

    You're right, Whyte may have actually been designing for Muddy Fox a couple years earlier.
    Some brits with better memories than me might weigh in on the subject.

    Whyte licenced his rear suspension design to Marin and they're still building them. Not the Whyte fork though.

    Sidenote: BMW's Telelever system was ripped off from the British Saxon design.
    (designer gave BMW a good couple months with his prototype, he forgot to have it patented first, they patented it, now he can't use his own design).

  15. #15
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    Broken rear swing arm

    Hi Guys,

    I'm a PRST-1 owner, but mine's rather sickly so I'm in need of some help.

    The rear triangular swing arm has cracked on the chain ring side through the weld for the bearing. So I'm looking for one of the following:

    - Someone with a rear swing arm for PRST-1 they no longer want.
    - Someone with a PRST-1 frameset they no longer want
    - Some guidance on how successful welding the frame will be (an engineer friend of mine says it can be done).

    I'm pretty sure the rear swing arm is the same for all frame sizes and that I want part number PRES20SA, so if anyone knows where I can get one that would be great.

    Thanks
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  16. #16
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    Sorry to see that happen on you PRST-1. It crack right around the single pivot so I recommend fixing it right away. I think your best bet is to try to get warrantey through ATB Sale who distribute Whyte in England. I'm sure they still have parts for the PRST's just not sure how much they want to charge you. Do you know what caused the crack?

    I seen a PRST-1 fitted with a elevated chain stay swingarm of the later JW-1 model's also from Whyte which is another options for you. I also think early 2000 Marin models which use the same single pivot rear swing arm as the Whyte's are interchangeable.

  17. #17
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    A warrantee replacement would be ideal apart from 2 things: -
    1. Whyte only offer a 5 year warrantee
    2. They haven't got any in stock

    Having said that I'll try calling ATB myself, and maybe get some recommendations from good dealers who might have a frameset or something knocking about in the store room.

    Tell me more about the Marin option, and if you know which models might be compatible so I can start search EBay and the other forums.

    Thanks for your comments.

  18. #18
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    prst1 owners

    Hi,

    i've just bought a prst1 , after many years of searching, for a decsent example, so another owner joins the ranks of the few..
    Apparently i am in need of a whyte setup template for the rear suspension, they were made from cardboard, so my question is has anyone still got one and if so could you please send me a photo, with the relevent diamensions on so that i could fabricate one.

    thanks in anticipation

    kevin

  19. #19
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    Quote Originally Posted by andyhyde66
    A warrantee replacement would be ideal apart from 2 things: -
    1. Whyte only offer a 5 year warrantee
    2. They haven't got any in stock

    Having said that I'll try calling ATB myself, and maybe get some recommendations from good dealers who might have a frameset or something knocking about in the store room.

    Tell me more about the Marin option, and if you know which models might be compatible so I can start search EBay and the other forums.

    Thanks for your comments.

    Sorry for such a late feedback but here it is, I know the 1999-2002 approx. Marin Mount Vision/East Peak rear swing arms are interchangeable with PRST-1's and Marin and Whyte all share the same bearing size and also Marin and Whyte have always joint develope rear suspension design's since late 90's. Even now you'll see that all carbon rear end of the Whyte E-120 have come across the atlantic and show up in 2009 Mount Vision after two year since its introduction in England.

    The rear disc adapter have since long gone from Whyte for the PRST-1's but I got a feeling if the Marin still have some adapter's left for their Mount Vision 99-2002 frames, it should bolt right on.

    Some like the clearance that was provided by the elevated chain stay design of the Marin's and Whyte JW-2's so many were transplanted by hardcore racers. Hope this helps.
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    Last edited by fjyang; 01-17-2009 at 06:28 PM.

  20. #20
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    Quote Originally Posted by jblackburn
    Hi,

    i've just bought a prst1 , after many years of searching, for a decsent example, so another owner joins the ranks of the few..
    Apparently i am in need of a whyte setup template for the rear suspension, they were made from cardboard, so my question is has anyone still got one and if so could you please send me a photo, with the relevent diamensions on so that i could fabricate one.

    thanks in anticipation

    kevin
    Whats wrong with your rear end? I think it'll be hard press to get some kind of CAD files release from ATB sales regarding the PRST's. Your best bet is to get a early 1999-2002 rear end from Marin directly if they still have some left or find one off ebay.

  21. #21
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    set up template

    Hi,

    thanks for the reply, but the template i am enquiring about, is to set up the rear suspension, it states in the owner's manual, that you sit on the bike, put pressure into the rear shock and then check with the template, for correct travel, as for CAD files, that would'nt be a problem, as my brother has a wicked computer system linked to a lathe/cnc machine.

    thanks

    kevin

  22. #22
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    Hi,

    thanks for the reply, don't need new rear end, just need setup template which was supplied with all new whyte's prst1's to set up the rear suspension.

    thanks

    kevin

  23. #23
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    Quote Originally Posted by jblackburn
    Hi,

    thanks for the reply, but the template i am enquiring about, is to set up the rear suspension, it states in the owner's manual, that you sit on the bike, put pressure into the rear shock and then check with the template, for correct travel, as for CAD files, that would'nt be a problem, as my brother has a wicked computer system linked to a lathe/cnc machine.

    thanks

    kevin
    You really don't need the template to setup your rear suspension, I think I have the cardboard stash somwhere. 20-25% sag is the rule, I go with 20% myself and you suppose to pump the rear shock to match your weight so 185lb person should use 185psi in their rear shock as a rule. Like everything else, these are just guidelines to get you started and one should adjust up or down to suit their riding style and terrain.

    Some newer rear shock and fork from RockShox already have the sag measurement printed on the shock pistons or stanchions so its even easier to setup.

    Hope this helps

  24. #24
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    Hi,

    thanks for the info.
    does anyone know what the frame colour is called,apart from grey???and where can it be bought, for touching up stone chips.

    thanks

    kevin

  25. #25
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    Quote Originally Posted by byknuts
    You're right, Whyte may have actually been designing for Muddy Fox a couple years earlier.
    Some brits with better memories than me might weigh in on the subject.
    I remember the Muddy Fox bike from my youth, but the muddy fox was originally designed by Dave Smart in the very early 90s, he then licensed the design to MF. Jon Whyte was a very famous Formula 1 race car designer before he created Whyte bikes. He was the head suspension designer for Benetton in 1994 when Schumacher won his first F1 championship. Amazing bloke who bought real fresh ideas to the bike world. He really revolutionised the full suspension market in the UK as his bikes were the staple of many riders in the mid 90s.

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