Gears on TDF bikes
First time on the forum, lots of interesting stuff.
I'm a keen cyclist, 70+ miles a week in summer and recently did a 290 mile cycle ride from Cheltenham to St Ives in Cornwall, UK. Got my eldest who's 11 into cycling to and from school and he's been asking about the number of gears on TDF bikes and I don't know the answer! Might be very easy or have been asked before but if anyone could give us an explanation we'd be gratfeul. Wondering what number and also if there are any specific differences between a TDF bike and a normal road bike in gear terms.