Shimano Hollowtech bottom bracket sleeve ITA cups, MTB crankset, 2 x 2.5mm washers
Description
When you want to use MTB hollowtech II crankset on a frame with italian bottom bracket, you need to get creative. My plan was to use ITA road bottom bracket cups, add a 2,5mm thick washer on each side between the cup and the frame, which gets me close enough to the total width of an MTB BB cups (ideal 95.9mm vs mine 95.2mm). The washers for BSA bottom bracket can be easily obtained from MTB bottom brackets (plastic), or in my case I bought 2 aluminium from aliexpress. These then need to be filed or machined to increase the internal diameter by about 1mm to fit over the slightly larger M36 threads of the ITA cups. For this I also needed the plastic sleeve that protects the axle and the bearings from debris inside the frame, and this thing is the plastic sleeve.
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