Results 1 to 13 of 13
  1. #1
    mtbr member
    Reputation:
    Join Date
    Jan 2014
    Posts
    4

    Trying to get my rockhopper below 20lbs - how to do it without spending crazy money

    Hi All,

    Long time lurker but first time poster, I have a 2009 rockhopper expert that i recently went to 1 x 10 on, whilst doing this I thought about weight savings in general etc.

    Original weight of the bike I estimate to be around 27.5lb - 28lb - so a fair bit to shave off. However, here is what info I have and the changes made... (all on very limited money and as and when deals or opportunities arose)

    Forks - rigid carbon now 870g's (cannot change as new)
    Wheels - changed to dt swiss xc 1600's (cannot change)
    Crank - 1 x 10 zee
    Bottom Bracket - XT
    Pedals - wellgo flats @ 320g pair (cannot change)
    SLX cassette - 365g
    Chain - KMC 280g
    Rear XT mech - 270g (cannot change)
    1 x XT shift - 130g (cannot change)
    Furious fred x 2 @ 320g each (cannot change - new)
    Tubes - generic at 150g each
    SLX brakes
    Ashima rotors - 190g pair (cannot change)
    Thomson Elite post - 245g
    Hope seat clamp - 20g (new)
    Charge Knife Saddle - 210g (fairly new and got for peanuts)
    Thomson Stem - 160g (need 10 degree rise)
    Ritchey Bars - 180g (could trim down)
    FSA headset - 95g (new)

    I reckon the bike currently weighs 20.5lb - 21lb

    So in order to lose another lb (on very limited money) I can see the obvious ones as follows...

    Seatpost - Masterpiece - drops 60g's
    Tubes - continental - drops circa 80g's
    Skewers - (KCNC) - drops circa 60g's from the current DT swiss ones
    XT cassette - drops 40g's

    Managed to blag half a pund there but would ideally like a lb without spending loads as this has been done on the cheap so far

  2. #2
    mtbr member
    Reputation: TiGeo's Avatar
    Join Date
    Jul 2008
    Posts
    3,483
    Ok, the XT cassette won't shave that much over your SLX, more like 30g (just did a similar switch myself). Why no go to tubeless and loose the tubes all together (not sure if your rims are tubeless-ready or if you would have to run rim strips which offset some of the weight loss). Crank would be another source but you are going to have to spend here to go carbon. KMC X10SL chain will shave ~20g..again..just did this myself. I am sure you can get lighter brakes than SLX...but those work so good why change them. You can get a stem that is in the 100g range. Niner RDO carbon flattop bar is ~160g I believe. What grips are you running? ESI's can shave 50g or more. It starts to get hard!
    Geologist by trade...bicycle mechanic (former) by the grace of God!

    2012 Specialized Stumpy EVO 29 HT

  3. #3
    mtbr member
    Reputation:
    Join Date
    Jan 2014
    Posts
    4
    thanks for the reply, I thought I had got to a position where things were going to get a little tough. I think the biggest bang for buck at the moment would be skewers & tubes (assuming I don't run tubeless) - 50 ish for around 1/3 of a pound (150g's)

    I am fairly certain the wheelset I have is tubeless ready so can investigate this a little further

    Completely agree with the brakes - certainly the best brakes I have run so far on an MTB and I got them for peanuts off a hard up mate

    I'll check out stems, my grips are crank brothers foams - much lighter than what came off

    So realistically we're talking touching close to silly money to achieve under 20lbs'

  4. #4
    mtbr member
    Reputation: TiGeo's Avatar
    Join Date
    Jul 2008
    Posts
    3,483
    Tubeless...to me...us a no-brainer. If they are tubeless ready you can loose 100 per wheel.

    Sent from my SCH-I545 using Tapatalk
    Geologist by trade...bicycle mechanic (former) by the grace of God!

    2012 Specialized Stumpy EVO 29 HT

  5. #5
    mtbr member
    Reputation:
    Join Date
    Jan 2014
    Posts
    4
    they are certainly tubeless ready - have to confess this is a little alien to me so will need some reading up on this

  6. #6
    mtbr member
    Reputation: TiGeo's Avatar
    Join Date
    Jul 2008
    Posts
    3,483
    Lots of info here. Should just need to tape them (they may already be taped), add a valve stem, and add a scoop of Stan's. Inflate and ride.

    Sent from my SCH-I545 using Tapatalk
    Geologist by trade...bicycle mechanic (former) by the grace of God!

    2012 Specialized Stumpy EVO 29 HT

  7. #7
    mtbr member
    Reputation:
    Join Date
    Jan 2014
    Posts
    4
    ok cheers, the rims already have a strip in - not sure on compatibility though as from memory they were like a plastic feel. Based on what you have said above it does sound rather simple

    My tyres are tubeless ready as well so no issues there. So fingers crossed I should be able to save circa 100g each end doing this?

    200g on tubelss (25?)
    60g's on skewers (30)
    60g's on post (however have found a kcnc post which will drop aruond 100g's) but reviews on the kcnc seem a mixed bag (80 ish)
    30g's on cassette (30)
    55g's on Ritchey Stem (35)

    minimum saving is 405g or circa 1 pound with the KCNC - outlay approx 200

    the required / desired pound isn't so unrealstic really

  8. #8
    mtbr member
    Reputation: TiGeo's Avatar
    Join Date
    Jul 2008
    Posts
    3,483
    The tubeless weight savings is calculated by figuring a scoop of stans weighs 50g and the tube you are removing weigh 150g..but you are adding back a valve stem...it's close enough to figure on 100 saved per wheel.

    Sent from my SCH-I545 using Tapatalk
    Geologist by trade...bicycle mechanic (former) by the grace of God!

    2012 Specialized Stumpy EVO 29 HT

  9. #9
    mtbr member
    Reputation: moefosho's Avatar
    Join Date
    Apr 2013
    Posts
    1,837
    You might want to get the actual weight of your bike right now. I think the original weight was about 30 lbs. I got my WW 2007 stumpjumper (pretty much same frame) down to under 23 lbs easy, but after that it was tough to get to that extra couple lbs.

  10. #10
    mtbr member
    Reputation: RS VR6's Avatar
    Join Date
    Mar 2007
    Posts
    783
    Go single speed.

    Friend just built up a rigid Carve...and its at 21.5 lbs.

    Full XT drivetrain/brakes, Thomson stem/carbon bar, Specialized Roval carbon wheels, S-Works Ground Control tires, Chisel rigid fork.

    IMO...it'll be very difficult and expensive to get a Rockhopper under 20lbs. The RH frame itself is on the heavy side.
    Cervelo S2
    Specialized Carve Pro
    Pivot Mach 5

  11. #11
    mtbr member
    Reputation: campergf23's Avatar
    Join Date
    Aug 2013
    Posts
    161
    I find it hard to believe your rock hopper weighs that little (not calling you a liar or anything)

    Sent from my SGH-S730M using Tapatalk

  12. #12
    mtbr member
    Reputation: phlegm's Avatar
    Join Date
    Jul 2006
    Posts
    839
    Camper may have a point. Your initial weight guesstimate could be a bit low, and your final suspicion suggests you've dropped ~7 pounds, which is pretty aggressive. You might be disappointed on a digital scale.

    In any event, you can drop 100g for $40-50 via a carbon saddle on eBay. Great cost/g.

  13. #13
    mtbr member
    Reputation: TiGeo's Avatar
    Join Date
    Jul 2008
    Posts
    3,483
    The comment "I reckon it weights..."..have you actually weighed it with a proper digital scale OP?
    Geologist by trade...bicycle mechanic (former) by the grace of God!

    2012 Specialized Stumpy EVO 29 HT

Similar Threads

  1. Replies: 143
    Last Post: 02-26-2014, 08:30 AM
  2. 20lbs Full Suspension 29er - Help with my build!
    By flafonta in forum Weight Weenies
    Replies: 12
    Last Post: 11-07-2013, 09:01 AM
  3. Worth spending more money on a Toddler bike?
    By joepa150 in forum Families and Riding with Kids
    Replies: 15
    Last Post: 06-13-2013, 06:37 AM
  4. Is worth spending the money?
    By Ali_ in forum General Discussion
    Replies: 6
    Last Post: 12-11-2012, 05:29 AM
  5. Bike Check Vid! One 9 SS #20lbs
    By DavidNeiles in forum Niner Bikes
    Replies: 5
    Last Post: 03-08-2012, 08:55 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •