• I reckon a 12-21t* 8 speed cassette would be fine on a TT set-up, any advice? paired with a 52/42 chainset.

    Well, for normal (i.e. not SPOCO) courses, the old school rig was 1x6, 53 ring and a 13-18 freewheel. That's for ordinary people like me, riding 25 miles in the 58 minute area. The fast boys might have gone as high as 57 on the chainring with the less common 12-17 freewheel.

    In the final analysis, though, who gives a fuck? The timekeeper measures how long it took you to cover the course, not how fast (or otherwise) you pedalled in the process, so just use whatever gives you the fastest times.

About

Avatar for gbj_tester @gbj_tester started