Scott RC 900 SL Scale 6.22kg/Spark 7.33kg - Worlds lightest 29"ers

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andreszucs
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by andreszucs

Gullholm wrote:
Crankarms: 332,0g and 335,5g
Chain rings: 36T = 75,3g
38T = 82,7g


Ok....sir, this beats my custom S-works crank.

S-works 175mm Drive side, stripped paint (171) with Titanium axle bolt (29.2g): 200.2g
S-works 175mm Non drive side, stripped paint (left): 158g
Lockring, part of the crank: 6g
Garbaruk Monocorona 36d specialized s-works rotonda nero mtb:76g

Total: 440.2g
Last edited by andreszucs on Wed Apr 19, 2017 12:57 am, edited 1 time in total.

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andreszucs
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by andreszucs

Gullholm wrote:
godzuki26 wrote:Wow!!! I can only dream about the Tune cranks as I have not seen anyone with them in the USA. With the 30mm spindle and the BB86 bottom bracket on your Scott frames, what Bottom bracket cups will you be using? I must say I check this forum for updates every day. I have not seen so much detail put into a mountain bike. This is the best.


Thank you, I truly appreciate your kind words!
I will use the Tune bearings, and hopefully they are durable enough even if they're on the small side of course. They use double rows for better durability, weight is 73,5g.



How about Full Ceramic bearings? I have purchased some from China at decent price like two years ago....and still running like a champ. I just can't find a 30x41x7 'yet'....to run with my BB30 Cranks.

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poynt
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Location: Devon, UK

by poynt

andreszucs wrote:
Gullholm wrote:
Crankarms: 332,0g and 335,5g
Chain rings: 36T = 75,3g
38T = 82,7g


Ok....sir, this beats my custom S-works crank.

S-works 175mm Drive side, stripped paint (171) with Titanium axle bolt (29.2g): 200.2g
S-works 175mm Non drive side, stripped paint (left): 158g
Lockring, part of the crank: 6g
Garbaruk Monocorona 36d specialized s-works rotonda nero mtb:76g

Total: 440.2g


my Lightnings, and I still hope to drop them another 15g changing to a 4 bolt ring like a extralite octaone and the carbon-ti spider and sand them matt as well.

Image

Gullholm
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Location: Sweden

by Gullholm

andreszucs wrote:Ok....sir, this beats my custom S-works crank.

S-works 175mm Drive side, stripped paint (171) with Titanium axle bolt (29.2g): 200.2g
S-works 175mm Non drive side, stripped paint (left): 158g
Lockring, part of the crank: 6g
Garbaruk Monocorona 36d specialized s-works rotonda nero mtb:76g

Total: 440.2g


That's still quite light!
About the bearings, I thought about some ceramics but that felt like the last upgrade to make on a mtb. So regular ones for now.

poynt wrote:my Lightnings, and I still hope to drop them another 15g changing to a 4 bolt ring like a extralite octaone and the carbon-ti spider and sand them matt as well.

Very nice, hard to compare to a 32T though. :beerchug:

Fork is now done for the moment, waiting for parts from Hopp Carbon and ShiftUp and then some final work by me. Very happy with how it goes together with the wheel!
Sorry for the bad quality photo.

Image

bikemaniack
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by bikemaniack

WOOOOOW!!!!!!!

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LeDuke
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Location: Front Range, CO

by LeDuke

ohadamirov wrote:Good job!

BTW, with ND Tuned OVR damper you can save additional 100g

Might as well toss a Lauf on there then, if you're happy with no damping, or terrible damping.

Sent from my XT1585 using Tapatalk

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andreszucs
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by andreszucs

gorgeous! your build will deserve to go viral when is done!

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andreszucs
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Posts: 460
Joined: Mon Nov 28, 2011 7:15 am

by andreszucs

poynt wrote:
my Lightnings, and I still hope to drop them another 15g changing to a 4 bolt ring like a extralite octaone and the carbon-ti spider and sand them matt as well.

Image



How come? :( I thought the s-works is a copycat on the lightning? how come is much heavier?

wingguy
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by wingguy

That is seriously, seriously sexy. How are you going to bear getting it all muddy after it's finished? :lol:

burglarboycie
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Location: Northamptonshire UK

by burglarboycie

Incredible!! The fork is looking even better than I expected.

Gullholm
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Location: Sweden

by Gullholm

Thanks for all the positive comments, it really is nice to hear after all the hours spent on getting this far. :beerchug:

wingguy wrote:That is seriously, seriously sexy. How are you going to bear getting it all muddy after it's finished? :lol:

Haha the plan is to document the hell out of the bike when it's finished (photos, videos etc), then I hopefully won't feel too bad after the first rainy ride. :lol:

aki
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Location: Valkeakoski, Finland

by aki

I seriously respect your efforts, Gullholm. In the end of 26" era, I tried to build quite light Scott Spark, but your dedication takes the weightweeniesm to totally new level! This simply is a great thread to follow.

Here is a photo of my old Spark. I still have it in sub 8 kg condition. But you will go clearly below these weights, and the new Spark will definitely have much better handling performances than the old one.

Image

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andreszucs
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by andreszucs

aki wrote:I seriously respect your efforts, Gullholm. In the end of 26" era, I tried to build quite light Scott Spark, but your dedication takes the weightweeniesm to totally new level! This simply is a great thread to follow.

Here is a photo of my old Spark. I still have it in sub 8 kg condition. But you will go clearly below these weights, and the new Spark will definitely have much better handling performances than the old one.

Image



daaamn, that's light! I'm a Spark addicted, I still ride this 26 version....but with 26+ tires....and 150mm fork (DT Swiss EXC)....can't complain.

Gullholm
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by Gullholm

aki wrote:I seriously respect your efforts, Gullholm. In the end of 26" era, I tried to build quite light Scott Spark, but your dedication takes the weightweeniesm to totally new level! This simply is a great thread to follow.

Here is a photo of my old Spark. I still have it in sub 8 kg condition. But you will go clearly below these weights, and the new Spark will definitely have much better handling performances than the old one.


Thank you for the kind words. Hopefully these bikes can inspire some new cool builds by others. There are lots of light parts available these days, but it's very rare now to see people build mountain bikes with real attention to detail/weight like it used to be done back in the days.

Even considering that is a 26" it's still a very impressive weight! Always cool to see ww-builds like that, thanks for sharing.

Gullholm
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by Gullholm

Slowly but steady getting the work done. Middle section left and then time for the final steps of sanding to get the finish nice and smooth. :beerchug:
Not looking forward to the area by the lower shock mount though... :lol:

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