Using spacers between BB and crankset on GXP

Discuss light weight issues concerning road bikes & parts.
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wheelsONfire
Posts: 2687
Joined: Mon Jul 07, 2014 8:15 am
Location: NorthEU

by wheelsONfire

sfo423 wrote:
Tue Mar 19, 2019 6:48 am
Thanks. At ~45 nm it’s not as free spinning at my dura ace. A bit taught. I assume some riding will free it up a bit.


TobinHatesYou wrote:
Tue Mar 19, 2019 5:11 am
sfo423 wrote:
Tue Mar 19, 2019 5:01 am
Just looking up similar issue. I have a new F10 with a GXP bb installed and using Red 22 GXP cranks. It does not come with any washers or shims so I assume this is a simple bolt up? Slide nds arm on > give a couple taps with a mallot > torque bolt to spec.

Is that it?

You don't even need a mallet. Torquing the bolt down will apply more than enough forced to mesh the NDS crank onto the spindle. And yes, no shims or wave washers are needed. The crankset clamps around the cartridge bearing's inner race, which is fixed in place in the NDS threaded BB cup, which in turn is fixed in place in the bicycle frame's BB shell.
Not many cranks manage to hammer Shimano cranks on this point. Do you have zero washers and/ or spacers at the axle?
On my bike i use BB386 Red crank on a BB386 frame.
3.2mm spacer + 2* 0.5m washers NDS.
2.5mm spacer + 2*0.5mm washers DS.
Bikes:

Ax Lightness Vial EVO Race (2018.12.21)
viewtopic.php?f=10&t=156137
Paduano Racing Fidia (kind of shelved)
Open *UP* (2016.04.14)


Ex bike; Vial EVO D

sfo423
Posts: 555
Joined: Fri Dec 22, 2006 6:12 pm
Location: San Francisco

by sfo423

No spacers; no washers.

Spec was like ~48-52 n/m and that is a shit ton (at least it felt like it). I stopped in low 40's.


wheelsONfire wrote:
Tue Mar 19, 2019 8:49 pm
Not many cranks manage to hammer Shimano cranks on this point. Do you have zero washers and/ or spacers at the axle?
On my bike i use BB386 Red crank on a BB386 frame.
3.2mm spacer + 2* 0.5m washers NDS.
2.5mm spacer + 2*0.5mm washers DS.

by Weenie


User avatar
wheelsONfire
Posts: 2687
Joined: Mon Jul 07, 2014 8:15 am
Location: NorthEU

by wheelsONfire

My crank spec says 54 Nm. I torque it at around 50 Nm.
Don't remember right away what it was at my FSA, Rotor and Easton crank.
But i do know that it was higher at the Red crank.

FSA crank on my frame, need no spacers.
Bikes:

Ax Lightness Vial EVO Race (2018.12.21)
viewtopic.php?f=10&t=156137
Paduano Racing Fidia (kind of shelved)
Open *UP* (2016.04.14)


Ex bike; Vial EVO D

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