I did the dynamo on 49 x 19 (about 67GI) but that was flat...
I just perused the thread from the original St Margarets ride and it seems Ma3K did it 77 GI brakeless! Another poster commented that 72 GI was 'too spinny'. OLC reckons it's doable on my 74GI commuting gear, but will probably gear down to 69GI.
I just perused the thread from the original St Margarets ride and it seems Ma3K did it 77 GI brakeless! Another poster commented that 72 GI was 'too spinny'. OLC reckons it's doable on my 74GI commuting gear, but will probably gear down to 69GI.