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  1. #1
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    Sub-20lb 26" hardtail funbike help

    I currently have a 33lb coiled Nomad that I use. It works well in the bike park, as well as 30-50mi XC rides, as I don't really mind taking my time on the climbs, as long as I can have a fun descent. I love smashing rocks and sending drops with it. Very fun bike and well worth the weight when I'm in that kind of a mood.

    For a change of pace, I'd like to build a lightning fast weight-weenie 26" carbon hardtail just to have a big change of pace on more boring trails, or when riding with the girlfriend, and also to round out my biking skills.

    I'm on a tight budget (of course), and I have a spare U-Turn Air Revelation 150mm and Crest wheelset that I have swapped onto my Nomad from time to time. I'm planning on shimming the Revelation down to 130mm and using the U-Turn feature to run it anywhere from 100mm-130mm depending on the intensity and style of the trail. Pretty sure I'll enjoy the slacker geometry at 130mm on longer descents, when I feel like playing with U-Turn. I'll also be running it 1x9 with a homemade 11-40 cassette, mating a 10spd Shadow+ derailleur with an SRAM X9 9-speed shifter.

    Code:
    Frame	  Ebay Carbon		1300
    Headset	  Stock Alloy		 120	
    Fork	  Revelation 150mm 20mm	1720 (have already)
    Wheels	  Crest with DTSw 240	1455 (have already)
    Tires	  Maxxis Ikon		1060
    Brakes	  Avid Elixir CR	 780
    Derailuer Shimano XT Shadow+ 	 258
    Shifter	  SRAM x9		 125
    Cranks+BB SRAM x7/x9 spiderless	 600
    Chainring Wolftooth 30T		  50
    Cassette  SRAM 970 (modified)	 380
    Chain	  PC991			 230
    Seatpost  Thompson Setback	 180 (have already)
    Saddle	  WTB Silverado		 240
    Grips	  KCNC Grips		  15
    Bars	  EC70 660mm		 150
    Stem	  EA90 90mm		 120
    Pedals	  XPEDO XMX24MC Flats	 243
    			
    				9026
    
    				19.9lbs
    What would you swap out to make it lighter without going silly on the budget?

    Obviously a different fork could save about 300g, and you can always go lighter on the tires and wheels, but I like to ride pretty fast and hard and already have those parts. So let's rules those both out for now.

    I live in CO and love riding high country 30mi trails, so SS is not on the agenda.
    Last edited by Lindahl; 08-14-2013 at 08:38 PM.

  2. #2
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    Saddle and grips. Both are cheap and both can give some decent weight savings. Also, If you are running 1x9 your chain might end up lighter than that depending on how many links you take out.

    For using a Revelation and that frame 20lbs is pretty dang good. My old Stumpy had a 1300g frame and I used a Revelation and I was at 22lbs.
    2008 Redline Monocog 29er SS/Rigid
    2013 Marin Mount Vision XM7
    FS: 26" Black Flag Expert Wheelset (new), Reba 29 Fork

  3. #3
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    My 21" Ebay carbon 650b frame weighs 1150g. You're looking at a heavy frame. I built a very similar bike for similar uses but went rigid fork and Reverb post. 19lb for about $1700.
    Keep the Country country.

  4. #4
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    It was the only 26" hardtail frame on ebay that had 1 1/8" steerer. Link to yours?

    (I haven't bought yet - that's the quoted weight +/- 100g)

  5. #5
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    Just picked some of these up off ebay......cheap and light.....

    XPEDO XMX24MC MAGNESIUM PLATFORM PEDALS

  6. #6
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    Sweet. That's an easy ~100g. I also noticed that the ODI grips are pretty heavy, and some cheap lightweight EVA foam grips come in at 16g, so that's another 100g. Also, I noticed I was calling out the X9 rear shifter at 240g, which is for the pair. So that's another 120+g.

    Updated the original post and I'm coming in just under 20lbs. Not sure if there's much else I can do without an extra few $100, but at least the numbers are coming up about where I want them (the build will likely end up just above 20lbs due to misc random crap and off-spec components).

    I'm not too familiar with brakes, but I'm wondering if that might be the next best place to save weight? Replacing the stock alloy headset probably, also. KCNC Rotors and Ti bolts could save another 60g+, but I've heard bad things about KCNC fading, and we have long descents out here.

  7. #7
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    Quote Originally Posted by Lindahl View Post
    It was the only 26" hardtail frame on ebay that had 1 1/8" steerer. Link to yours?
    Yes, all the frames are tapered headtube now, though crown races exist to run your fork with a 1.5" lower headset. That way you have future compatibility. I got the FR-502. It was quoted at 1150g and came in on the dot, surprising for the large frame size.
    Keep the Country country.

  8. #8
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    Did a reality check, even our tamer smooth trails are pretty rough in CO. A carbon hardtail just wasn't cutting it when I tested one out. Looks like it's gonna be an ASR5 or Blur TRc, or something along those lines at around 22-23lbs. 3lbs well spent, I guess. Maybe an ASRc though as well.

  9. #9
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    I have a 22.58lb TRc.... Your build will be very simar in weight....

    Here's a picture before the new pedals.....
    Attached Thumbnails Attached Thumbnails Sub-20lb 26" hardtail funbike help-trc.jpg  

    Last edited by lewke; 08-19-2013 at 10:35 AM.

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