| Diagram | Fig. 22 — REAR WHEEL · ref 15 |
| Subsystem | wheels |
| Listed in parts books | 1971–1972 |
BSA Speedometer drive gearbox (1·25/1)
A 1.25:1 speedometer drive gearbox from the rear wheel assembly, converting wheel rotation into speedo cable drive.
This is a speedometer drive gearbox with a 1.25:1 ratio, catalogued under rear wheel components. It's the small gearbox that takes drive off the rear wheel or hub and sends it up the speedo cable, converting wheel rotation into the reading you see on the dial.
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The catalog carries this part across appearances in 1971 and 1972, filed under the rear wheel figure. The manufacturer tag on this one leans BSA, so if you're working on a Triumph and this turned up in a parts search, double check the number against your own parts book before ordering.
We don't have more detail on this one beyond the ratio and where it sits in the rear wheel assembly. Call the shop and we'll confirm fitment before you order.
We've never carried this one. Tell us what you're after and we'll go looking — you'll get a price and photos before you commit to anything.
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