since i've always had problems with my bottom bracket... especially the bearings getting loose/trashed and the left crank arm always coming loose... i thought i should look at my options for replacing everything between the pedals
any recommendations? especially since i'm not exactly light weight (250-ish lbs.)
are there size differences between manufacturers or is it one-size-fits-all?
i mostly just ride through town but also some rough, fast trails... no jumps though
since i've always had problems with my bottom bracket... especially the bearings getting loose/trashed and the left crank arm always coming loose... i thought i should look at my options for replacing everything between the pedals
any recommendations? especially since i'm not exactly light weight (250-ish lbs.)
are there size differences between manufacturers or is it one-size-fits-all?
i mostly just ride through town but also some rough, fast trails... no jumps though
What are you riding now?
I like ISIS -- I'm riding RaceFace Next LP on Truvativ Sealex SL. The Truvativ Sealex are not as good as I'd like -- the first only lasted me about 4k miles and the 2nd was tight (as if the bearings were binding a little or slightly cocked) for the 1st 1k or so miles. But, they're the only ones that make a 118 which I need to get enough clearance between my cranks and my swingarm pivot.
I like ISIS -- I'm riding RaceFace Next LP on Truvativ Sealex SL. The Truvativ Sealex are not as good as I'd like -- the first only lasted me about 4k miles and the 2nd was tight (as if the bearings were binding a little or slightly cocked) for the 1st 1k or so miles. But, they're the only ones that make a 118 which I need to get enough clearance between my cranks and my swingarm pivot.
David
right now it has whatever's stock for the bike... 97/98 nishiki colorado... but the left crankarm has been replaced a couple times
taking a closer look at it... there's 3 threads exposed on the left side... right side looks ok... but there's no wobble in it at all
plus the crankarms don't seem like they're at 180 degrees... maybe 5 degrees off... is that normal?
I've busted more BB's than I care to count. I swaer that the last BB I will ever buy is the Race Face North Shore XS (ISIS) now know as the Signature XS raceface.comcomponents.phpOpen ↗
It is one tough mother-fscker of a Bottom Bracket. I've TRIED to break mine... I can't do it. (250 Lbs, farly agressive and sloppy rider)
"alpamsfq" <[email hidden]> wrote in message "]news:[email hidden]... | Neil Duckworth <[email hidden]> wrote... | > Yeah how come its always the left crank? Had that problem with three bikes at our place. Y is | > that?? only use shimano cartridge BBs now Last for ages | > | | isn't it supposed to be true that if you're right-handed you're left leg will be stronger... maybe | that's why | | speaking of shimano... on mtbr.com the deore bb's are rated higher than the | xtr... shouldn't it be the other way around? | | any specific shimano bb you'd recommend? | | preferably one with the square connection to the crankarms... it would be nice to avoid tripling | the cost with the most basic part of a bike | | -- | chris ·´¯`·.¸¸. alpam:sfq ·´¯`·.¸¸. | | Most basic part???????
no way the dust cap surely has that spot.......or in some cases the rider!
Simon.......I use profile cranks with a Ti axle and BMX bottom bracket. But then I am like that.
"ClydesdaleMTB" <[email hidden]> wrote in message "]news:[email hidden]... | I've busted more BB's than I care to count. I swaer that the last BB I will ever buy is the Race | Face North Shore XS (ISIS) now know as the Signature XS | raceface.comcomponents.phpOpen ↗ | | It is one tough mother-fscker of a Bottom Bracket. I've TRIED to break mine... I can't do it. (250 | Lbs, farly agressive and sloppy rider)
That's a pretty good reco, coming from the breaker of all things bikes!
"ClydesdaleMTB" <[email hidden]> wrote in message "]news:[email hidden]... | I've busted more BB's than I care to count. I swaer that the last BB I will ever buy is the Race | Face North Shore XS (ISIS) now know as the Signature XS | raceface.comcomponents.phpOpen ↗ | | It is one tough mother-fscker of a Bottom Bracket. I've TRIED to break mine... I can't do it. | (250 Lbs, farly agressive and sloppy rider)
That's a pretty good reco, coming from the breaker of all things bikes!
Hey! I haven't broken anything bike related in well over a year.
Well, except for the pawls that disintergrated inside my DT-Swss Onyx hub... good thing I was at the TOP of Podunk Road, I was able to cost almost the whole way back to the parking-lot. ;-)
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I wonder if my old AT-4 Pro still lives.
It is alive and well, hanging on the wall, along w/ Mark's. (Yes, I'm hoarding them ;-)
Looks like it. It was never designed with such riding in mind. As you originally posted, you aren't into that kind of thing, and as I said, it's solid for the price if you stay near the ground. Besides, some people on mtbr can break anything (or certainly brag they can).
"Andy Chequer" <andy@(youdontwantthisbitinit)thisisasparagus.com> wrote in message "]news:[email hidden]... | | "alpamsfq" <[email hidden]> wrote in message "]news:[email hidden]... | > Andy Chequer <andy@(youdontwantthisbitinit)thisisasparagus.com> wrote... | > > | > > If you want to stick with sqaure taper, I've had good use from the XT | > (UN72) | > > BB. It's good cost/durability ratio for me, and I'm a large chap myself. | > > | > > Andy Chequer | > > | > > | > | > so what's with all the bad reviews on mtbr? | > | > mtbr.comproduct 20373.shtmlOpen ↗ | | > a lot of them say the xt suddenly breaks | | They've got their two cents, I've got mine. | | > or is this just from people who do 20 foot drops? | | Looks like it. It was never designed with such riding in mind. As you originally posted, you | aren't into that kind of thing, and as I said, it's solid for the price if you stay near the | ground. Besides, some people on mtbr can break anything (or certainly brag they can). | | Andy Chequer | |
I concur with Andy on this. I use the UN72 almost exclusively, and I'm even heavier than ClydesdaleMTB (albeit somewhat shorter) and I've NEVER (knock on wood) broken one. I've worn out a couple of older ones, but that was in due course.
"Nelson Binch" <[email hidden]> wrote in message "]news:[email hidden]...
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"Andy Chequer" <andy@(youdontwantthisbitinit)thisisasparagus.com> wrote in message "]news:[email hidden]... | | "alpamsfq" <[email hidden]> wrote in message "]news:[email hidden]... | > Andy Chequer <andy@(youdontwantthisbitinit)thisisasparagus.com>
wrote...
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| > > | > > If you want to stick with sqaure taper, I've had good use from the
XT
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| > (UN72) | > > BB. It's good cost/durability ratio for me, and I'm a large chap myself. | > > | > > Andy Chequer | > > | > > | > | > so what's with all the bad reviews on mtbr? | > | > mtbr.comproduct 20373.shtmlOpen ↗ | | > a lot of them say the xt suddenly breaks | | They've got their two cents, I've got mine. | | > or is this just from people who do 20 foot drops? | | Looks like it. It was never designed with such riding in mind. As you originally posted, you | aren't into that kind of thing, and as I said,
it's
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| solid for the price if you stay near the ground. Besides, some people
on
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| mtbr can break anything (or certainly brag they can). | | Andy Chequer | |
I concur with Andy on this. I use the UN72 almost exclusively, and I'm
even
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heavier than ClydesdaleMTB (albeit somewhat shorter) and I've NEVER (knock on wood) broken one. I've worn out a couple of older ones, but that was
I concur with Andy on this. I use the UN72 almost exclusively, and I'm
even
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heavier than ClydesdaleMTB (albeit somewhat shorter) and I've NEVER (knock on wood) broken one. I've worn out a couple of older ones, but that was
in
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due course.
Indeedly. I've broken a couple of UN52 ones (in one instance on a huge roundabout in the middle of Birmingham, UK - I was nearly killed) but the UN72 has a forged steel axle rather than the cast pig iron ones of the lesser offerings. For a small amount of extra oney, the UN72 is so much more BB.
Andy Chequer <andy@(youdontwantthisbitinit)thisisasparagus.com> wrote ...
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Indeedly. I've broken a couple of UN52 ones (in one instance on a huge roundabout in the middle of Birmingham, UK - I was nearly killed) but the UN72 has a forged steel axle rather than the cast pig iron ones of the lesser offerings. For a small amount of extra oney, the UN72 is so much
more
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BB.
well sounds good... now i just have to see if i can get one
is the un52 and un72 clearly marked somewhere... especially packaging?
how much $ anyway?
and thanks for all your help (and to everyone else in this thread as well)
well sounds good... now i just have to see if i can get one
is the un52 and un72 clearly marked somewhere... especially packaging?
You'll be able to tell which one's which because the box of the UN52 will have 'UN52' written on it and the box of the UN72 will have 'UN72' written on it. If in doubt, speak to one of the staff - they're specially trained for these sorts of situations.
"alpamsfq" <[email hidden]> wrote in message "]news:[email hidden]...
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Andy Chequer <andy@(youdontwantthisbitinit)thisisasparagus.com> wrote ...
Quoted message said:
Indeedly. I've broken a couple of UN52 ones (in one instance on a huge roundabout in the middle of Birmingham, UK - I was nearly killed) but
the
Quoted message said:
Quoted message said:
UN72 has a forged steel axle rather than the cast pig iron ones of the lesser offerings. For a small amount of extra oney, the UN72 is so much
more
Quoted message said:
BB.
well sounds good... now i just have to see if i can get one
is the un52 and un72 clearly marked somewhere... especially packaging?
how much $ anyway?
and thanks for all your help (and to everyone else in this thread as well)
The UN52 (LX) and UN72 (XT) are about as ubiquitous as bicycle parts get, and are available in a plethora of sizes. Any decent bike shop should have either in stock - ask for them by name and they'll know what you mean. They are generally around 15 UK Pounds for the UN52, and 20-25 UK Pounds for the UN72. Like I said, it's rude not to have the 72.
Make be sure to give them the correct shell width and axle length to suit your frame and crankset. Another approach would be to go in to the shop, point at bike, say "UN72 Please" and let them get on with it while you have a nice cup of tea, and maybe a bun.
