Bottom Bracket Assistance

Discuss light weight issues concerning road bikes & parts.
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JScycle
Posts: 145
Joined: Wed Mar 08, 2017 11:41 pm

by JScycle

Hi All,
I have a 2016 Scott Addict with what I assume is a BB 86.
I currently have an Ultegra crankset but if I was to switch to another company such as Sram would I need GXP or BB30 cranks.
Also would I need a different bottom bracket.
Any measurements and information would be awesome
Thanks :)

p3dalfaster
Posts: 78
Joined: Tue Jun 16, 2015 10:22 am

by p3dalfaster

For the Scott's, you will need the SRAM PF GXP 86.

http://www.chainreactioncycles.com/sram ... d|291564UK

JScycle
Posts: 145
Joined: Wed Mar 08, 2017 11:41 pm

by JScycle

p3dalfaster wrote:For the Scott's, you will need the SRAM PF GXP 86.

http://www.chainreactioncycles.com/sram ... d|291564UK


Thankyou, so does that mean I need the Sram GXP cranks?

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bikerjulio
Posts: 1901
Joined: Fri Dec 11, 2009 10:38 pm
Location: Welland, Ontario

by bikerjulio

JScycle wrote:
p3dalfaster wrote:For the Scott's, you will need the SRAM PF GXP 86.

http://www.chainreactioncycles.com/sram ... d|291564UK


Thankyou, so does that mean I need the Sram GXP cranks?


Without going into a long explanation - yes, if you wish to use a SRAM crankset. And a GXP BB to go with the frame.
There's sometimes a buggy.
How many drivers does a buggy have?

One.

So let's just say I'm drivin' this buggy...
and if you fix your attitude you can ride along with me.

http://www.youtube.com/watch?v=GekiIMh4ZkM

JScycle
Posts: 145
Joined: Wed Mar 08, 2017 11:41 pm

by JScycle

bikerjulio wrote:
JScycle wrote:
p3dalfaster wrote:For the Scott's, you will need the SRAM PF GXP 86.

http://www.chainreactioncycles.com/sram ... d|291564UK


Thankyou, so does that mean I need the Sram GXP cranks?


Without going into a long explanation - yes, if you wish to use a SRAM crankset. And a GXP BB to go with the frame.


Thankyou, so what is the difference in shimano spindles and sram gxp spindles?

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havana
Posts: 352
Joined: Tue Jan 09, 2007 5:04 pm

by havana

Shimano is 24 mm.

Gxp is 24 mm on one end and 22 on the other (it's tapered).
Most "innovations" in cycling are solutions for non-existing problems.

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bikerjulio
Posts: 1901
Joined: Fri Dec 11, 2009 10:38 pm
Location: Welland, Ontario

by bikerjulio

Well actually it's stepped, not tapered.

The NDS bearing has a nominal 22 mm bore and the step on the spindle butts up to it. When the spindle bolt it tightened a lip on the crank contacts the inner race, clamping onto the bearing, thereby holding the spindle laterally.
There's sometimes a buggy.
How many drivers does a buggy have?

One.

So let's just say I'm drivin' this buggy...
and if you fix your attitude you can ride along with me.

http://www.youtube.com/watch?v=GekiIMh4ZkM

JScycle
Posts: 145
Joined: Wed Mar 08, 2017 11:41 pm

by JScycle

bikerjulio wrote:Well actually it's stepped, not tapered.

The NDS bearing has a nominal 22 mm bore and the step on the spindle butts up to it. When the spindle bolt it tightened a lip on the crank contacts the inner race, clamping onto the bearing, thereby holding the spindle laterally.



Thanks so much!

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