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Bottom Bracket replacement - what replaces a square taper lp-26?

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Bottom Bracket replacement - what replaces a square taper lp-26?

Old 03-17-11, 09:36 AM
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corkscrew
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Bottom Bracket replacement - what replaces a square taper lp-26?

I'm overhauling a early 90's rockhopper for a friend. The BB is grinding and needs replaced.

I pulled it last night, and it's marked as follows:

Shimano LP-26 73 1.37x24 - It's for an older acera triple crank.

I know 73 is the BB shell width, but the length is what I'm having problems with. Is it not marked?

I suppose I'll have to find some calipers to measure the blasted thing...

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Old 03-17-11, 01:34 PM
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Any of the un series b/bracket with the correct axle length in mm will work with 73-length, starting about $25.
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Old 03-17-11, 01:37 PM
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corkscrew
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Yeah I'm realizing that now after some research. Just irked that they either didn't put the spindle length on the original BB, or I'm blind.
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Old 03-17-11, 01:56 PM
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I think the new models are sold in 2mm increments so you could measure with a metric straight edge if you don't want to buy calipers.
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Old 03-17-11, 07:00 PM
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corkscrew, I just measured a LP30, came out to 120 mm. Put the plastic cap on the BB to level it, and using a straight edge on the end of the axle (I used a block of wood) draw a line on a piece of paper for each end and measure.

Brad
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Old 03-17-11, 09:40 PM
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I picked up some calipers @ harbor freight. Nothing fancy, but the spindle edge to edge came out @ 111.6mm. That would match sheldon's database for the acera x cranks, which is 110 or 113.

Is it better to opt for the shorter or longer spindle?
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Old 03-17-11, 09:46 PM
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Originally Posted by corkscrew View Post
I picked up some calipers @ harbor freight. Nothing fancy, but the spindle edge to edge came out @ 111.6mm. That would match sheldon's database for the acera x cranks, which is 110 or 113.

Is it better to opt for the shorter or longer spindle?
The 73/113 will be the easiest to source and will work fine.
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Old 03-18-11, 04:26 PM
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Thanks 65er! A 73/113 has been ordered, along with a slew of other consumable parts. I don't think this bike has seen any maintenance ever. 20+ years old and has the original cables!
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