Thanks for all the info last night, the pointing to web sites and the concerns. After a sleepless night and should I, shouldnt I, I couldnt bear to see kids disappointed faces this morning [the ride is the highlight of yr 6 after SATS] so the bikes were fettled this morning, with your input] in 5 mins.
39 kids turned up to ride and 39 did [9 didnt ride as they couldnt ride a bike].
We started in temps of 20 degs, on an array of bikes which included some BMXs, 20 miles later and 4.5 hours, every one finished. What an achievement for some kids who have never biked 100m away from home
We had another 7 miles to go after that but it was all downhill apart from the uphills
Thanks again guys your help made some kids day
Tracey