Scott Spark 2022 crankset / chainline issue

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samarskyrider
Posts: 170
Joined: Wed Sep 17, 2008 5:14 pm
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by samarskyrider

Hello everyone,

Looking for your advice on how to solve the following problem. I'm swapping the crankset from older Scott Spark 2018 (Quarq XX1 GXP) to a newer Spark. Both frames feature 148mm boost spacing, identical PF BB92 shells, so I thought it won't be an issue. My goal is to keep Quarq Powermeter together with XX1 GXP cranks. However, after installing those onto new frame, I've observed severe chainring (34T) rub against chainstay protector. I've tried to add some spacers to the driveside, but that doesn't help much, because I cannot properly tighten the cranks (it gets too tight to spin freely). Looks like I will need newer DUB cranks, but now there is another question

Based on SCOTT website info: "The all-new Spark platform is Designed around a 55mm chain line - this allows us to do a few interesting things."

From what I've learnt, there are several versions of powermeter ready XX1 DUB cranks

1. 52mm chainline
2. 55mm chainline

Do I understand correct, that if I buy #2, I will be able to keep my Quarq boost compatible powermeter? If so, then which bottom bracket will I need, as there are so many :evil:

nicporter
Posts: 10
Joined: Wed Apr 05, 2023 9:38 pm

by nicporter

could you run a zero offset chainring? what chainline would that give you?

something like a superstar raptor??

if the boost gxp is giving you a 52mm chainline then a zero offset would give you 55?

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nicporter
Posts: 10
Joined: Wed Apr 05, 2023 9:38 pm

by nicporter

could you run a zero offset chainring? what chainline would that give you?

something like a superstar raptor??

if the boost gxp is giving you a 52mm chainline then a zero offset would give you 55?


edit: sorry missed the powermeter bit - not sure how rings work with these!!

snaxez
Posts: 311
Joined: Fri Jun 06, 2014 7:14 pm
Location: Estonia

by snaxez

Quarq boost spider is same for both options. The XX1 cranks are different. So you can use old Quarq spider with new 55mm chainline crank.
But the 55mm chainline one is hard to find.

52mm chainline XX1 crank 8-bolt
https://www.bike24.com/p2344323.html
https://www.bike-discount.de/en/sram-xx ... nk-arm-set
165mm 00.3018.270.165
170mm 00.3018.270.170
175mm 00.3018.270.175

55mm chainline XX1 crank 8-bolt
https://www.bike24.com/p2704116.html
https://www.bike-discount.de/en/sram-xx ... -arm-set-1
165mm 00.6118.642.165
170mm 00.6118.642.170
175mm 00.6118.642.175

If you are in US
https://www.probikesupply.com/products/ ... nline-gray
https://www.probikesupply.com/products/ ... nline-gray

for BB any DUB PF92 should work.

samarskyrider
Posts: 170
Joined: Wed Sep 17, 2008 5:14 pm
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by samarskyrider

Thanks for such an extensive reply!

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