- GXP bottom brackets
Just gone through the 2nd Superstar BB in 6 months (non ceramic), and although they are great value, I’d rather not replace it every couple of months.Posted 5 years ago
Whats the best GXP BB in terms of value and performance at the moment? Is it worth spending out on a Hope and a converter or…??TaffMember
Unfaced bb shell shouldn’t have any affect on the GXP if in reading the blurb right. Shimano is a different set up causing side loading on the bearings which if the bearings aren’t square will cause an issue. Went through an xt bb in two weeks due to not facing it then had it done and it lasted 2years. Not sure on gxp yet. Just done a year on one bb (team) so will see how the next one goesPosted 5 years agoSprocketJockeyMember
My KM came with a Truvativ GXP – first time I’ve had anything other than a square taper BB. BB shell is faced but the first one lasted barely a year and the second is showing signs of wear at 6 months. For comparison the poverty spec Shimano square taper BB on my 1×1, which is ridden far harder has been on there for about 4 years and still solid as a rock.
Call be a luddite (you won’t be the first) but external bearing BBs seem like a classic case of a solution looking for a problem that didn’t exist in the first place.Posted 5 years agoNorthwindSubscriber
Don’t just all external BBs by Truvativ standards- they also make terrible internal BBs. Isoflow, as far as I can tell, was specifically designed just to make Isis look good.
I’m still using shimano square taper in the commuter but I’ve no problems at all with Shimano external BBs either, always a bit mystified how some people seem to kill them so fast (well, actually, I reckon it’s mostly overtightening, they don’t like it at all and mountain bikers love overtightening things…)Posted 5 years agomintimperialSubscriber
but external bearing BBs seem like a classic case of a solution looking for a problem that didn’t exist in the first place.
Depends on your definition of problem. The indestructible nature of cheapo square-taper cartridge BBs is a problem if you are, say, an accountant looking at ways of increasing profit for component manufacturers…Posted 5 years agonutsnvolksMember
My stumpy came with gxp I replaced it after a couple of months and the new one didn’t last any longer! Think they are made from cheese! I then converted to shimano external BB and changed crankset ect and its still going strong 1 year later with some serious abuse in the alps and here!Posted 5 years agojonweMember
I cleared out the shed recently and found 7 knackered superstar and truvativ gxp bbs. Average life circa 4 months at 20-30 miles of mud per week.
I put hopes on both my bikes a year ago and no problems since.
To be fair to superstar, they do honour their 1 year guarantee.Posted 5 years agoteaselMember
Depends on your definition of problem. The indestructible nature of cheapo square-taper cartridge BBs is a problem if you are, say, an accountant looking at ways of increasing profit for component manufacturers…
Indeed. I can imagine him scribbling a few ideas himself and presenting them to the board…
Accountant-san : Whaddya think ?
Big S : But you’re an account!Posted 5 years ago
Accountant-san : Exactly…
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