Hello WoordWorkJohn,
The approximate lengths are as follows:
T8: Long arm: 68.5mm, Short arm: 16.5mm.
T10: Long arm: 76mm, Short arm: 18mm.
T15: Long arm: 83.5mm, Short arm: 20mm.
T20: Long arm: 92mm, Short arm: 22.5mm.
T25: Long arm: 101mm, Short arm: 25mm.
T27: Long arm: 112mm, Short arm: 28mm.
T30: Long arm: 126.5mm, Short arm: 31.5mm.
T40: Long arm: 139mm, Short arm: 38mm.
T45: Long arm: 156.7mm, 41mm.
Thank you for using Q&A. (LM).
Answered by: LMac
Date published: 2020-08-06