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  1. #1
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    GT Arrowhead to single speed

    Hi

    This is my first 'complete' project. I have a fixed wheel bike which I built using a prepared track frame and I love riding it, but you guys (and others) seem to have great fun on SS MTB's!

    When this GT Arrowhead frame appeared on eBay I bought it. 99p is all I paid but as you can see, it was not in a good way. The bottom bracket had seized both in the shell as well as the bearings, I am guessing this may of been the reason for the previous owner dumping the frame (I bought it from a scrap dealer)

    I am a computer programmer by trade and have never really got my hands dirty before. I love riding but want something unique as well as single speed. The triple triangle of the GT frame fits the bill nicely. My garage has space but limited tools. This should be an interesting project.

    I know I am going to need advice and this forum looks like the best place to find it. Along the way I will be learning new stuff which I am more than willing to share with others

    I've got the frame stripped, the gear lugs grounded off and am getting ready to remove the dings and scrapes (filing and filling!)

    Please let me have your comments and suggestions

    Thanks
    Misbehavious
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  2. #2
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    Simple advice: Add parts. Ride.
    '08 GF Montare
    '10 Rockhopper SS
    Semper Fidelis
    02-10 SSGT of Marines
    (Most) always down for a ride in the Gville area

  3. #3
    Ovaries on the Outside
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    What is up with the dropouts? You have all the parts?

  4. #4
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    orion_134: I like your ethos

    umarth: I'm slowly getting the parts together, still lacking wheels, stem, saddle, chain, bb, chainset, seat post, seat post clamp, ahead headset

    I got the dropout from http://www.mountainbikecomponents.co.uk/ who were amazingly helpful, especially considering I had no idea what the dropout looked like!

    I've got some white primer and hopefully some fluorescent orange spray paint on its way with clear lacquer. Still got bits of the old paint on the frame, one more weekend should sort that out.

    eXotic forks should arrive tomorrow. I've gone for rigid forks but may upgrade once I know the bike is going to work.

    Progress is being made but need another payday, quickly!

  5. #5
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    Umm...you got the dropouts? Those funny-angled dropouts aren't what came on the bike?
    Jesse
    '08 GF Montare
    '10 Rockhopper SS
    Semper Fidelis
    02-10 SSGT of Marines
    (Most) always down for a ride in the Gville area

  6. #6
    Ovaries on the Outside
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    Quote Originally Posted by Misbehavious
    eXotic forks should arrive tomorrow. I've gone for rigid forks but may upgrade once I know the bike is going to work.

    Progress is being made but need another payday, quickly!
    Well, keep the SS forums posted on changes and updates.

  7. #7
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    Thanks umarth, I will

    orion_134: I think I am missing your point. Below are two images, One is a closeup of the dropout and the second the gear hanger. Should there be more?

    Thanks in advance
    Attached Images Attached Images   

  8. #8
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    Ahh, now I can see that it has a removable dropout. All is well. Why all the filling? Rattlecan-and-go Is it aluminum?
    Jesse
    '08 GF Montare
    '10 Rockhopper SS
    Semper Fidelis
    02-10 SSGT of Marines
    (Most) always down for a ride in the Gville area

  9. #9
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    Hi Jesse

    I think you are right, Rattlecan-and-go will solve most issues. The frame is Aluminum 7005 and there are a few scraps on it. I will probably file those level and then spray primer to fill.

    Glad we're ok on the dropouts. Just have to find cash and time to finish!

  10. #10
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    it may be just me, but all the times i have gone to great lengths to paint a frame, i always end up wishing i had just left if and ridden it. it's going to get dirty and scraped up. consider that every hour you spend making your bike pretty is an hour you could have spent riding it and getting it dirty and dented and scratched.

    what do you plan to do about chain tension?

  11. #11
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    An unfamiliar drop out for me.

    I am planning to remove the cable stays too as soon as I get my 3rd frame.

  12. #12
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    mack_turtle: I'm with you there, thankfully I have a few bikes that can be ridden whilst this one is prepared and painted. The frame was in a very bad state as well as me wanting something unique. If I had built it up to start with I would probably of never stripped it down to paint!

    jackspade: The dropout is weird. Matching it up was a nightmare for me, not for the company listed above though. I am hoping for a magic gear but just incase I bought a this chain tensioner of eBay for 11.00. It is unbranded but will hopefully do the job.
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  13. #13
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    I got your cousin
    Attached Thumbnails Attached Thumbnails GT Arrowhead to single speed-p2270022.jpg  


  14. #14
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    hatake that is a very good looking bike. I have ordered straight bars but looking at how you have complemented the frame with yours I am not sure I have done the right thing. I'll wait to see what they look like. You also have disc brakes which won't feature in the first carnation (Low funds and little knowledge - will learn though!). Have you got anymore photos?

    Paint arrived today, as did a fork steerer cutter. No sign of forks though.

    Anyone else got photos of GT's that they have single speeded? I'm still looking for ideas and inspiration as hatake has done here

    Thanks in advance

  15. #15
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    Look ay my Profile

    [QUOTE=
    Anyone else got photos of GT's that they have single speeded? I'm still looking for ideas and inspiration as hatake has done here [/QUOTE]
    Hey check out my profile and under my pics there is a red GT Backwoods that I converted to single speed. I still have that bike though so if you have any questions or need a closer look at some thing let me know.

  16. #16
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    REDGT: Like it. Very much. You have gone for one strong colour with black trim. Definitely works, thank you.

    It will be interesting to see if orange works as well as red

  17. #17
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    Wait, should the bar type be determined by fit and not aesthetics?
    '08 GF Montare
    '10 Rockhopper SS
    Semper Fidelis
    02-10 SSGT of Marines
    (Most) always down for a ride in the Gville area

  18. #18
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    Thanks
    It works for me, plus thats the original paint. But I am curious on what yours will look like with flourescent orange.

  19. #19
    The need for singlespeed
    Reputation: zaskaranddriver's Avatar
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    Quote Originally Posted by Misbehavious
    Anyone else got photos of GT's that they have single speeded?
    Mine used to look like this:


    Now the frame is 50g lighter and getting some nicer parts

  20. #20
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    orion_134: You are correct, it should be about the ride. I am hoping that the flat bars suit me and the bike but having seen hatake's setup I can't lose from an aesthetics point of view

    zaskaranddriver: What new parts have you got planned? It looked good before? Have you got a paint scheme in mind or are you leaving it bare? Please keep posting pictures as you build

    REDGT: Your bike must of really stood out in the shop, that red looks excellent. Please post your favourite or most current photo (of the GT!) on this thread

    Keep your GT's coming

  21. #21
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    Misbehavious
    I will take some new picture later on tonight. If you want a close up of any thing or want a parts list let me know.
    But this shot shows its most current set-up.

    Last edited by REDGT; 10-14-2010 at 06:30 AM.

  22. #22
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    REDGT: I really like your bike!! Can I ask for a closeup of the drive chain (both cog ends). Also what size BB did you put in? is the wheel a cassette wheel converted or a ss wheel?

    Thank you

  23. #23
    The need for singlespeed
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    Quote Originally Posted by Misbehavious
    zaskaranddriver: What new parts have you got planned? It looked good before? Have you got a paint scheme in mind or are you leaving it bare? Please keep posting pictures as you build
    Ditching the tensioner in favor of a Forward Components eccentric bottom bracket and will replace the LX cranks with modded M960s. The frame will stay raw.

  24. #24
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    Primered!

    Hi

    Frame has been primered over the weekend. Now ready for the fluorescent orange to be applied
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  25. #25
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    legs!

    Wheels have been ordered. Got some Halo SAS 26' Wheelset (Spin doctor hubs) of eBay. I hope they are as good as they look.

    Only part missing is the saddle. Everything else is either on it's way or I have it

    Just need to finish spraying it - sanding down tonight ready
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  26. #26
    one chain loop
    Reputation: fishcreek's Avatar
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    umm.. those rims wont work with v-brakes..

    okay maybe i'm wrong, i want to see it happen.
    everything sucks but my vacuum cleaner.

  27. #27
    Drinking the Slick_Juice
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    Quote Originally Posted by fishcreek
    umm.. those rims wont work with v-brakes..

    okay maybe i'm wrong, i want to see it happen.

    I think you are right
    "If women don't find handsome , they should at least find you handy."-Red Green

  28. #28
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    oops. have fun with that: v-brakes on a rim that has no braking surface.

  29. #29
    The need for singlespeed
    Reputation: zaskaranddriver's Avatar
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    Maybe he's planning on running a V-brake to disk adapter?

  30. #30
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    The guy I bought them off said that he had used them with V-brakes, admittedly he did not mention if they worked or not!!

    Looking at the Halo website for the wheels it does say that the anodized rims can be run with V-brakes, hence why I bought them.

    If they don't work with V-brakes then they will go back on eBay

    Told you I was new to this

  31. #31
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    Something tells me these rims may not work with your frame.

    1) Have you measured the dropouts? Are the hubs the right size for the type of drop out on your frame?
    2) The rims look like they are freeride/ downhill type rims (designed for really fat tires.) I suspect the tires will rub on your stays.
    3) It looks like the rims are designed for disc rather than v-brake.

  32. #32
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    Wheels

    Hi

    These wheels are causing more interest than the rest of the build!

    OK, I agree that they are DH wheels, very solid

    They are on a QR hub and do have a braking surface

    They fit into the frame, I have not put the replaceable drive side drop-out into frame though

    There is a gap but tyres have not arrived to confirm, hopefully they will be here today

    And here are the photos.

    Comments please?
    Attached Thumbnails Attached Thumbnails GT Arrowhead to single speed-img00364-20101019-1814.jpg  

    GT Arrowhead to single speed-img00365-20101019-1814.jpg  

    GT Arrowhead to single speed-img00366-20101019-1815.jpg  


  33. #33
    The need for singlespeed
    Reputation: zaskaranddriver's Avatar
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    I guess those wheels are appropriate if you're a 400 lb cross country rider,
    a 300 lb all-mountain rider, or plan on downhilling your hardtail, AND are
    getting a disk brake adapter (brake doctor I think it's called). Otherwise
    you need something else. If you're going to run v-brakes you need rims
    designed as such. If you're not downhilling or riding very technical trails
    or very heavy you can certainly get a lighter and more appropriate wheelset,
    probably for the same $$.

  34. #34
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    Hi zaskaranddriver,

    I think your term "Appropiate wheelset" is a very accurate and justified statement. I will be using the bike for XC only with rigid forks. I'm not 400lbs but I am on the heavy side

    We'll see what comes up on eBay in the next few weeks, obviously I like the look of these wheels but they are heavy!

    Thanks for your comments

  35. #35
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    Bright!

    Several coats of fluorescent paint have now been applied

    Hopefully parts can be added this weekend but I need some advice.....

    I have a clear coat to go over the top of the orange paint but should I T-Cut the orange first?

    Having never used a rattle-can before I am not sure of how to get the best finish
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  36. #36
    one chain loop
    Reputation: fishcreek's Avatar
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    one question, how tall are you?
    everything sucks but my vacuum cleaner.

  37. #37
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    Hi fishcreek

    I'm 6'2" and the frame is 20". Why do you ask?

  38. #38
    The need for singlespeed
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    It's a big frame, he's just wondering if it's sized right for you. I'd hit it with a little 600 grit before clearing.

  39. #39
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    The build had begun!

    Here are the latest photos of the build. You will notice that I have taken your comments about the wheels into account and now have a different set. I think they look sexier (may need to remove stickers!) and they are certainly lighter.

    I also read the comments in a different forum on mtbr regarding sprung tensioners, that has now been dumped for this colour matching SuperstarComponents one.

    I was surprised by the amount of noise the chain tensioner creates as the chain goes passed it, is this normal? It is also the first time I have set a tensioner up so I would appreciate everyone's comments and experience as to if this is the correct way

    Thank you
    Attached Thumbnails Attached Thumbnails GT Arrowhead to single speed-img00373-20101024-2150.jpg  

    GT Arrowhead to single speed-img00374-20101024-2151.jpg  

    GT Arrowhead to single speed-img00376-20101024-2151.jpg  

    GT Arrowhead to single speed-img00377-20101024-2151.jpg  


  40. #40
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    Tensioner should go under the chain and push it up.
    '08 GF Montare
    '10 Rockhopper SS
    Semper Fidelis
    02-10 SSGT of Marines
    (Most) always down for a ride in the Gville area

  41. #41
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    Thanks orion_134

    What are the benefits/drawbacks of swapping it round? Will it be quieter?

    I like how the chain is parallel (asthetics again!) above and below the chain stay. Will this way not work?

  42. #42
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    It will work, but you are reducing the chain's contact to the cogs. You should also be able to run a lower tension with the chain wrapped around more. It is probably noisy because you have the chain too tight. If you give the cranks a good backwards spin they should spin about 1.5-2 revolutions before stopping. If they stop before then, the chain is too tight.
    '08 GF Montare
    '10 Rockhopper SS
    Semper Fidelis
    02-10 SSGT of Marines
    (Most) always down for a ride in the Gville area

  43. #43
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    Reducing the chain's contact with the cogs makes sense and I probably have got the chain too tight. I will check tonight. Shame because I like how it looks, however I intend to ride this bike hard so I will sort the chain out to get maximum benefit from it

    Thanks again

  44. #44
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    I would just do away with the tensioner all together (if you can). It will look a lot better and it will be a lot quieter. However, you will need to calculate the "magic" gear ratio for your setup. Fortunately, there is a really easy and simple website that will do it for you. It's a program called "FixMeUp!" You will put in the front chain ring tooth range, rear tooth range and chain stay length. The software will show you all the gear ratios that will work with your setup. I just used it on my build and it worked perfectly.

    See here: http://eehouse.org/fixin/javafmu.php

    Have fun!

  45. #45
    The need for singlespeed
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    Just so you know, there's no guarantee you'll find a usable magic gear for your frame, but you might get lucky.

    That kind of tensioner will make some noise even with the chain tensioned correctly. It's annoying when you're setting it up but out on the trail you probably won't notice it.

  46. #46
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    I run the exact tensioner (STS, same design) with zero noticeable noise. My noise came from worn chain, worn teeth, eyeballed chainline, and tensioned too tight. Measured chainline, replaced cog/ring with straight cut, and replaced chain and smooth and quiet.
    '08 GF Montare
    '10 Rockhopper SS
    Semper Fidelis
    02-10 SSGT of Marines
    (Most) always down for a ride in the Gville area

  47. #47
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    I hope you are right zaskaranddriver that I won't notice it on the trail. I have loosened the tension and it does seem quieter.

    orion_134: All the components are new, when I take the chain tensioner away there is no noise. The tensioner does not roll very easily so I may grease it up later

    Thank you both for your comments

  48. #48
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    Finished!

    I am not totally convinced about my bar choice but I am pleased with the rest. I love the finished result and hopefully I will get some photos with a decent camera outside at the weekend.

    These photos do not show how bright the paint is, it does glow in the dark

    Please comment and suggest improvements

    Thank you
    Attached Thumbnails Attached Thumbnails GT Arrowhead to single speed-img00382-20101026-0902.jpg  

    GT Arrowhead to single speed-img00384-20101026-0903.jpg  

    GT Arrowhead to single speed-img00386-20101026-0903.jpg  


  49. #49
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    I've only ridden it round the block in the dark but it handles well and the gearing feels just right for me. Love it!

  50. #50
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    Just in time for Halloween (Black & Orange).

    Nice build. Congratulations!

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