The enlitening project- Mtbr.com
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  1. #1
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    The enlitening project

    Okay here’s the background. I built up the below Racelite including new sub11 dropouts and a custom front fork and new powder coat. I weighed the bike when I was done and it was about 22 lbs . My plan was to spend about $100 to lighten the bike and see what I could come up with. Hopefully this will also be a blueprint for others who want to know what gives the best bang for the buck. The bike is a 93-95 Bontrager race light. has a carbon seat post (OEM), Surly/ Sun Mach IV wheelset, Bonty Race cranks/ BB (both made by TruVativ) and aluminum Bonty stem (OEM) and Crowbar handle bars. The bottom (lighter) figures below are what I switched out .

    Estimated pre-weight 22lbs

    Tubes-
    Specialized standard 168gm
    Performance Lunar 96gm
    Savings 72gm

    Seat
    Bonty presentation seat 338gm
    Bonty Race 271gm
    Sette Race 190gm
    Savings (Sette) 148gm

    Bolts
    Steel 77gm
    Titanium 47gm
    Savings 30gm

    Bottom Bracket
    Bonty (Truvativ) 260gm
    FSA Ti 182gm
    Savings 78gm

    Crank Bolts
    Steel 19x2= 38gm
    Aluminum 10x2= 20gm
    Savings 18gm

    Axles
    Front QR 25gm
    Front TI 15gm
    Rear solid 93gm
    Rear 60gm
    Savings 10+33= 43gm


    Chain
    I have always liked the KMC Z610HX 3/32 chain; this bike had the Z510HX 1/8 chain; but at 308gm and 346gm respectively (45 links) I looked to a Shiamno IG I had that was lightly used; 252 gm. Saved 94 gm.

    Handlebar
    I bought a used Bonty Crowbar (5 deg) mainly for looks (340gm). After a few rides I R&R the handlebar with my all time favorite (parts bin); the Bonty RaceLite 620. With Bonty magnesium bar ends it was still about 60 gm less (170 + 110).

    Seatpost
    The Bonty/Titec Carbon was 14 in long. I cut off 3 in (still had 4 in inserted) and saved 26 gm.

    Stem
    I had pretty much figured I was done when this IBIS stem showed up on Ebay.; saved 100 gms

    Total savings 669 gm

    Post-weight 20.2 lbs; this is counting some way expensive new pedals. Why would you not count the pedals?

    The prices:

    Tubes- $20
    Seat 30
    Ti Bolts 50
    Ti Bottom Bracket 55
    Alloy Cranks Bolts 00 (came with the BB)
    Ti Fr Axle 30
    QR (Hollow) R Axle 20
    Ti stem 66
    Total $271 (oops)

    Okay so I went over, but $270 to cut out almost 2 pound is money well spent (I figure anything less than $100 @ ounce is a bargin). Future upgrades could be some alloy chain ring bolts (10gm savings) and a Ti water bottle cage (20gm saving)..

    BTW, with the addition of the Ti stem 4 of the Ti bolts were not used.

    1G1G, Brad
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    Last edited by aka brad; 12-25-2006 at 09:40 PM.

  2. #2
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    Nice build! I have used the same tubes and seat for bang-for-the-buck weight savings, but I wish I had started with the same frame!

    Where did you get the ti axles?

  3. #3
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    Quote Originally Posted by aka brad
    My plan was to spend about $100 to lighten the bike and see what I could come up with. .....
    Total $271 (oops)
    HAHAHAHA! I read the first part and wondered how much over you'd wind up.

    At any rate looks like you did a good job.

    When you have more money tell us more about the wheels. And tires.
    I ..... need ..... DIRT!!!!!

    ... and cookies. :D

  4. #4
    Retro Grouch
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    The wheels will stay the same..

    Quote Originally Posted by AndrewTO
    HAHAHAHA! I read the first part and wondered how much over you'd wind up.

    At any rate looks like you did a good job.

    When you have more money tell us more about the wheels. And tires.
    I knew the Surly wheels would be a bit heavy, but they are what I want. The tires are Hutchison Air light Pythons and as light as I'm willing to go.

    Brad

  5. #5
    Retro Grouch
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    Only the front hub is Ti..

    Quote Originally Posted by KeylessChuck
    Nice build! I have used the same tubes and seat for bang-for-the-buck weight savings, but I wish I had started with the same frame!

    Where did you get the ti axles?
    and I found it on one of Ebays online stores.

    Brad

  6. #6
    CB2
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    The Surly hubs really are not that bad weight wise, and adjusted correctly spin really nice. The Sub IV's are pretty light too; a little narrow for my taste though.
    You could save a couple more ounces converting them to tubeless ala Stan's.

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