If you're looking for light durable chainrings for sram xx - check out my lastest post on my blog. It's about Tune 39T vs. Sram XX 42T chainrings. Saved me 40 grams

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My blog
Scott Spark RC mtb
Scott Cx Team cross

Pent utført bygg!

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12 Canyon Aeroad CF 9.0 ETE
12 Canyon Ultimate AL
11 Cervélo P2

Very good job.

Great build, but frame is to big for you.

Thanks, djm and tompho.

anquetil: I know, so I changed it to a smaller one. Besides being a better fit, it saved me 15 gms or so

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WTB: MTB hubs, 29'er carbon rims

My 7.3kg/6.4 kg 29'er project buildthread!
My Bianchi Oltre XR

Any updates about the build Martin?

How much did it weight it the Racing Ralph's on the Sid fork?

Cheers

David

Perfect Ride!
Are there any photos of the bike with the rigid?

No updates on the build yet. The buildlist now is as follows:

Frame: Vipera sans clearcoat - 1174g
Fork: Sid WC XX - 1446g
Headset: Frankenset - 69g
Expanders + spacers + topcap: FSA - 55g
Handlebar: AX poseidon 620mm - 94g
Grips: Extralite ultragrips - 15g
Stem: Extralite UL3 - 86g
Seat/post: Berk composites - 142g
Seatpostclamp: Procraft - 10g
Shifters: Sec gripshifts (tuned) - 94g
Front derailleur: D-A 7900 with Carbon-ti X-pull - 81g
Rear derailleur: Sram XX with Roth Shek pulleys - 165g
Cables and housings: Powercordz - 32g
Chain: Kmc - 238g
Cassette: Sram XX - 187g
Crankset: Sram XX incl sram BB30 - 745g
Pedals: Shimano XTR - 310g
Brakes: Formula r1 racing with KCNC 160mm front/rear - 517g
Wheels: Stans notubes gold - 1326g
QR: Ebay titanium/carbon - 44g
Tubes: Yellow tape + American classic valves - 14g
Sealant: Joe's - 70g
Tires: Maxxlite 29 - 694g

Adding up to a total of 7609g suspended and 6694g rigid.

Changes I had to make:
Expander: I stripped the bolt, and the stem could not hold on tight enough to keep the headset properly in place. I had a heavy FSA expander laying around
Crankset: I could not get the Lightning to fit properly, so I bought an XX
Wheels: Had some problems with the Extralite/crest, so bought Race gold
Pedals: Eggbeater 4ti's developed a LOT of play after many years of service, swapped for XTR


Changes to come.
New wheels. Hopefully something just below 1300gms and with carbon rims to make them stiffer: -30g
New pedals: I now work in a shop that sells eggbeaters, so I'm buying some 2's and some aftermarket ti spindles: -98g
Maybe new chainrings: Tune for sram XX: -22g
New expander: Extralite ultrastar + lightweight carbon topcap: -37g

Still heavier than what I started with due to heaaavy crankset, but just below 7.5kg suspended and just above 6.5 rigid. I've also looked around to find the Apro-tek MC709ca to save 200gms :O

_________________
WTB: MTB hubs, 29'er carbon rims

My 7.3kg/6.4 kg 29'er project buildthread!
My Bianchi Oltre XR

Hey Martin - you need to let us see your smaller frame

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My blog
Scott Spark RC mtb
Scott Cx Team cross