Bottom bracket is toast. I'll preload the cranks and am just looking to ride tomorrow till bike shop opens on Monday. Am I risking my frame? SRAM DUB PF 92
Will riding this damage my frame?
byu/SteezyZoltan inbikewrench
by SteezyZoltan
Bottom bracket is toast. I'll preload the cranks and am just looking to ride tomorrow till bike shop opens on Monday. Am I risking my frame? SRAM DUB PF 92
Will riding this damage my frame?
byu/SteezyZoltan inbikewrench
by SteezyZoltan
10 Comments
I would not ride that could ovalize the bb of the frame.
Most likely the plastic sleeve that prevents the spindle from touching the inner race of the bearing has fallen apart/cracked out.
It will damage the crank first, then the frame later. Not worth it.
Don’t ride, this can and will damage the frame straight away
That will most likely fuck up your crankset, and you will have to buy a new one. DUB cranksets are very susceptible to spindle damage, when the bearings are shot. The spindle is made of aluminium, not steel. Once the spindle is even the slightest worn out, or gouged out (like you know, the spindle slips in the fucked up bearing), you will never be able to take out the play in it. And if you crank the bearing preload, you will screw up the bb, or the preload plastic ring (ofc on a new bb … if it’s dead, it’s dead … you can’t screw it up any more … oh wait, forget i said anything). Sram DUB cranksets are not the cranks you want to ride with fucked up bottom brackets. Shimano with steel spindles? Still debatable, but a short ride may be fine … i guess?
The frame will most likely be fine, because the shell looks like it has the alloy inserts, not the cheaper plastic ones. Though, that amount of play might make the chainring contact the frame, and chew up the chainstay. Or make the transmission drop a chain, and who knows what that might fuck up.
Why would you even ride that, in that state? Are you so desperate for a ride?
Fix man. It’s not fun to ride when something is sloppy in a place you can feel every time you pedal. Not to mention wearing down your crank, BB hole of frame, and your safety.
10 min job and $30 to change the bottom bracket. Or ride like that and bust the frame. I think the choice is clear.
Yes, take to your LBS.
Heard, everyone, thank you.
Aside form likely damaging the bottom bracket shell, you are also quite likely to snap a crank arm off your bike while riding. The crank will effectively be subject to repeated point load impacts. It is not designed to do that. It is designed, and tested, to function in a captive or static, fixed position.
You should 100% not ride this bike like this. You’ll risk cracking your frame, and you’ll risk losing a crank arm while riding, which puts you at a pretty severe safety risk.
Do not ride.
Do yourself a favor and build one bike from the ground up. It’s amazing what you can do when you know how to replace parts and put bikes together.