Sram red crankset GXP vs BB30
Moderator: robbosmans
There is a pretty big difference between 68mm and 86mm spindles.
I'd be careful assuming a bb30 branded crank with a longer spindle to fit all the way through. It's a gamble. Better measure yourself to be sure.
Turning to the manufacturer might prove useless too. They might want to rebrand that crank as bb386 at a higher price, and keep the compatibility info a secret.
/a
I'd be careful assuming a bb30 branded crank with a longer spindle to fit all the way through. It's a gamble. Better measure yourself to be sure.
Turning to the manufacturer might prove useless too. They might want to rebrand that crank as bb386 at a higher price, and keep the compatibility info a secret.
/a
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you are probably right but Quarq has the manual for bb386 installation.
https://quarq.zendesk.com/hc/en-us/arti ... _site=true
https://quarq.zendesk.com/hc/en-us/arti ... _site=true
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Here's my opinion
GXP is not the best, having a single loaded bearing on the non drive side for axial direction both ways doesn't lead to great bearing life.
BB30 in it's shorter axle length has very compact bearing spacing so the loads on it are high.
Best solution in my opinion is a BB30 with an extended length axle, some people call these BB386 but in reality they are units with a 92mm length.
Hope that helps
Hambini
GXP is not the best, having a single loaded bearing on the non drive side for axial direction both ways doesn't lead to great bearing life.
BB30 in it's shorter axle length has very compact bearing spacing so the loads on it are high.
Best solution in my opinion is a BB30 with an extended length axle, some people call these BB386 but in reality they are units with a 92mm length.
Hope that helps
Hambini
Hambini Aeronautical Engineer, Polluting YouTube since 2016 - views expressed are my own...
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From what it looks like online, the 2016 Addict is going to have PF86. Others have mentioned that the BB30 listed are actually BB386, which should work, but personally I'd go GXP.
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Extended axle in a BB30 would simply add more leverage on narrower stance bearings, creating more/faster wear and greater potential for creaking. Not ideal. Better to match the axle load from the cranks as close to the bearings as possible.
Actually, maybe that’s what Hambini was implying in his post when mentioning 386, but I can see how it could be interpreted as putting a longer 30mm spindle into a 68mm shell (hence the narrow bearing stance, long axle scenario), which would not be so great.
Actually, maybe that’s what Hambini was implying in his post when mentioning 386, but I can see how it could be interpreted as putting a longer 30mm spindle into a 68mm shell (hence the narrow bearing stance, long axle scenario), which would not be so great.
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Assuming your pedal position is the same, the overall torque or leverage generated by having an extended axle or a narrow axle with more splay on the crank arms is the same.Calnago wrote: ↑Thu May 10, 2018 5:03 pmExtended axle in a BB30 would simply add more leverage on narrower stance bearings, creating more/faster wear and greater potential for creaking. Not ideal. Better to match the axle load from the cranks as close to the bearings as possible.
Actually, maybe that’s what Hambini was implying in his post when mentioning 386, but I can see how it could be interpreted as putting a longer 30mm spindle into a 68mm shell (hence the narrow bearing stance, long axle scenario), which would not be so great.
What I was trying to say is having the bearings further apart which is more feasible on a "long" 92mm axle using 30mm bearings allows the bearing load to be reduced because the length of the cantilever is reduced.
Hambini
Hambini Aeronautical Engineer, Polluting YouTube since 2016 - views expressed are my own...