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Shimano XTR BB93 Bottom Bracket
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Shimano XTR BB93 Bottom Bracket


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Mfg PartNum: ISMBB93B
MSRP: $43.99
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The XTR BB93 takes a cue from Shimano's top road bottom brackets, now featuring smaller diameter bearings to save weight. This new design drops 21g off its ancestor and features a new seal system which reduces friction by 50%.

The XTR BB93 Bottom Bracket is available with English threads and includes three 2.5mm spacers for use with 68mm and 73mm shells. Compatible with all HollowTech II cranks. 77 grams.

B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

The product weight specified is an approximate weight based on the manufacturer's specifications (if available) or our measurement of one or two examples. For most products, the weight will typically vary by 5% to 10%.


Weight: 77 grams

Weight: 77 grams

Mfg PartNum: ISMBB93B 

Bottom Bracket STD: English (BSA) 


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Reviewed 1/3/2015
by slevasse
Cycling Enthusiast
Laconia, NH
Overall Rating
1 of 1 customers found this review helpful.
Super easy to install

I picked this up after my RaceFace bottom bracket decided to seize up mid ride. It's pretty lightweight and was very easy to install. Bearings feel very smooth and while I haven't really put it thru very much, it has stood up to some pretty nasty mud and muck with flying colors.

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Mechanic's Corner

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