Truvativ GXP bottom bracket
I wanted to replace the cheap nasty cranks on a new bike, with some spare xt’s I had in the basement. Looks easy enough, so whip the cheap nasty cranks off and try fitting the xt’s, but alas while they look deceptivly the same to the naked eye, they are in fact a different standard.
Couple of weeks later (tonight) armed with a new BB, attempt 2, I find they are too rounded to fit my BB tool.
Why makes something so similar to an open widely accepted standard, but be different just for the sake of it?Posted 4 years ago
banks – Member
Been a few reports of stripped threads : ( how many spacers?
One and a Stinger chain device.
Hope drive side does not have enough thread engagement
Yep, much less thread than a Truvativ cup.
Shame really as the bearings had not worn out, they’d done 3+ years and thousands of miles and were still perfect.Posted 4 years agodeadkennySubscriber
I don’t get the hate for GXP unless they’re not fitting the stuff correctly. Yes sometimes the dust cap can come loose but a rubber o-ring will solve that. Only happened once on one of my bikes.
5 years I’ve had bikes with GXP and really not been much of an issue and I’m happy to keep buying them. The BB is only £20 anyway, though only ever had to replace one once and it had done a couple of years of a lot of cruddy riding.Posted 4 years agotheonlywayisupMember
Great thread. I thought it was just me who had this problem!
The top hat washer on the drive side always comes away and runs flush with edge of the crank, letting in loads of shit to the bearings. So you need to put something in there to make sure it stays put. I use one of those little fat rubber bands.
I did that too, but it put too much pressure on the drive side bearing (which the fitting instructions say is to be avoided) and killed the GXP BB for a different reason.
In the end I opted for …
Best remedy is to ditch the truvativ cranks and fit a shimano crank & BB.
XT = perfect.Posted 4 years agodeadkennySubscriber
baznav73 – Member
“5 years I’ve had bikes with GXP and really not been much of an issue”.
I guess you don’t ride them, my last gxp lasted 5 weeks needless to say I no longer use them cheap or not.
Only one I’ve replaced due to being worn out had been running for 1500miles according to my Strava log. 2 years or so. Not huge xc kind of mileage, but regular average 2+ times a week mucking about AM bike in the grime and mud. Actually, I think the thing that killed it was the biblical rain of Morzine.
Got one on the hard tail that’s been running for the last 2 years also, about 1000miles. Still sweet and smooth. That’s been in a hell of a lot of crud.
I have to wonder, in what way are people deciding they’re shot? Just some grinding? If so, thought of just strip, clean and regrease (though first check it’s actually the BB. Many times I’ve seen people say their BB need sorting and on inspection it’s crud grinding on the chainring, or there’s weird feel in the cranks and it’s loose cranks or more often it’s an issue with the rear mech). Better still, stop jet washing or spraying with GT85 😛Posted 4 years ago
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