Shimano 12 speed Di2 B tension gauge
Guide for adjusting 12 speed Dura-Ace RD-R9250 and Ultegra RD-R8150 rear derailleur B tension.
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updated April 18, 2022
Description
PDFHas marks for adjusting B tension on 30t and 34t cassette cogs. The top of the gauge is for 28t cassettes.
Replaces the paper gauge that comes with the derailleurs (Shimano “GG Adjustment Gauge” Y3GK89600) and I have added a lip to make fitting it on the derailleur cage easier.
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