Cannondale SuperX power meter, spider, and chainring options

Especially for light weight issues concerning cyclocross / touring bikes & parts.

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mr2scott
Posts: 38
Joined: Wed Sep 19, 2018 12:39 pm

by mr2scott

I swear I went to put my wifes superx chainring on her slate and it was not even close to fitting correctly. I could fit my hand behind the chainring.

119 spindle on superx is becuase the BB is 83mm wide not 73mm.

Relientk1202
Posts: 19
Joined: Thu Apr 22, 2010 3:30 pm

by Relientk1202

This is a little off topic but I think that the Topstone Carbon uses the same bb30ai-83 as the SuperX. If I was going to fit a hollowgram sisl2 what size spindle do I need to find? 128mm?

by Weenie


menkar
Posts: 16
Joined: Tue Aug 10, 2010 5:23 am

by menkar

Relientk1202 wrote:
Fri Sep 06, 2019 4:41 pm
This is a little off topic but I think that the Topstone Carbon uses the same bb30ai-83 as the SuperX. If I was going to fit a hollowgram sisl2 what size spindle do I need to find? 128mm?
A 2X SuperX uses a 125 mm spindle and the spacers described here:
https://www.cannondaleexperts.com/Canno ... _6092.html

grover
Posts: 1178
Joined: Mon Jul 26, 2004 1:06 pm

by grover

119mm for 1x, 125mm for 2x with hollowgram cranks in the 83mm Ai bb shell

jever98
Posts: 914
Joined: Wed Feb 18, 2009 12:02 pm
Location: Seattle

by jever98

grover wrote:
Wed Oct 04, 2017 10:29 am
Hoven, use the 125mm spindle. Chainline will be fine.

Your P2M spider is designed around a 109mm spindle and 130mm rear dropouts for a chainline of 43.5mm.

The SuperX uses a 55mm chainline (to the big ring, not the middle of a double ring)

So with 125mm spindle your chainline is 51.5mm + half the spacing between a big and little chainring which will be very close to 55mm.

If it ends up too wide then use a SRAM CX1 chainring. The teeth are offset over the middle of the spider which will narrow the chainline compared to any aftermarket Narrow-Wide chainring (WolfTooth, Raceface, Garbaruk, OneUp, etc etc)
Hi Grover,

coming back to your tip of using the CX1 chainring for its offset: I have been running a p2m on my superx with a FSA Megatooth 44T for gravel. I got the chain ring with the p2m, so didn't really look at it in detail: the chainline was fine.

For CX, I went back to a 40T and got a RaceFace chainring (no offset), and the chainline isn't great.

The question I'm pondering: if I get a FSA Megatooth 40T, will it have the same offset as the 44T (which worked fine), or should I go with a SRAM CX1? I can't find documentation on the offsets.

Thanks for tips.
----
No longer in the industry

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