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The Noob B/b Question...


DaveG40

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Inside the b/b thread there doesn't seem to be anything about my frame. I bought it on Monday and need a new b/b fitted.

In my noob thread someone mentioned it was a saracen x-ess / x-ile frame, circa 2001.

Pic:

2558_1.jpg

I removed my cranks to find the l/h side is completely knackered - so after some hunting about i found 2 crank sets i like the look of and in my price range.

The first is a suntour duro dirt which fits ISIS b/b's only... these look strong(er) than my second option and have a heavy duty guard.

If i can fit an isis b/b i will buy the suntour duro cranks but if I cannot fit an isis b/b I have also found a standard square taper crank set.

This is the m-ighty x single ring 33 tooth crank set.

Can anyone help me out? Will i be able to fit an isis b/b or will i end up needing the m-ighty x 33 toother?

Many Thanks

Dave

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If you are wanting to build this up bit by bit into a trials bike, then you can pick up a set of Middleburn cranks on here cheapish (I've bought 2 sets, £35 each) second hand.

Both of the cranksets you've mentioned will be ok for a very short term fix, but are cheap and as such are made poorly/from worse materials.

If you're looking to end up with something ridable, it's worth spending a touch more (it doesn't have to be a lot, I've just built a full bike for £130, including Pro II, Maggies, 'burns etc) in the long run :)

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I'm not looking to make it into a trials bike. I just like this forum!

My aim is to have a 9 speed commuter with this frame.

Not going to be used for jumps etc - just for a bit of both road and off road use, i use underpasses and go over a couple of off road bits of terrain.

On further inspection isis b/b's are far too expensive for me...

Looks like i'll need a square taper replacement after all....

Shame

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I'm not looking to make it into a trials bike. I just like this forum!

My aim is to have a 9 speed commuter with this frame.

Not going to be used for jumps etc - just for a bit of both road and off road use, i use underpasses and go over a couple of off road bits of terrain.

On further inspection isis b/b's are far too expensive for me...

Looks like i'll need a square taper replacement after all....

Shame

Square taper should do you fine then really, just be sure to keep everything nice and tight to avoid rounding things off.

Again I'd still recommend a set of 'burns over some cheap option, as they're far from expensive, but extremely solid, yet lightweight, pimp and have the excellent warranty.

Alternatively, you can pick up bargains on the other better known/tried and tested models like deores, XT etc (depending on budget)

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If it's just for a normal mountain bike just get some deore hollowtechs. Cranks + rings + BB for £45, brand new. You won't get much better than that.

http://www.chainreactioncycles.com/Models.aspx?ModelID=22924

What's actually wrong with the bike at the moment? Why do you need both crank and a BB?

Thanks

When peddling the arm had play on the l/h side...

I thought it was just the b/b but after removing the arm I found the square taper was ok on the outer side but on the inner side the square hole was worn and had started to weaken the metal making it head toward being a diamond shape instead - lol

I think i have the same metal arm on my other saracen so maybe able to use that as a stop gap on a slightly worn b/b.

Will that kit fit my bike?

Dave

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I'd be very surprised if the bottom bracket it actually damaged. BBs have steel axles so they're strong and they don't deform as quickly as the soft aluminium tapers on the crank. Just get a replacement left hand crank from somewhere and you'll be fine.

By the sounds of it, neither of those other cranksets you're looking at are worth 'upgrading' to.

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