it's sounds like it's the bottom bracket but that means nothing. Not bothered with it yet, may just get it out later and see 
Congrats, it's not a race though, just have funDone the 8 miler again this evenin, average speed is a bit low at 12 mph but it's early days yet. Took me 40 mins, again a bit long but I'm workin on it.

12mph is quicker than when I started, mind you for most of this year I wasn't much quicker than that anyway.Done the 8 miler again this evenin, average speed is a bit low at 12 mph but it's early days yet. Took me 40 mins, again a bit long but I'm workin on it.

Average speed doesn't really mean anything...
Just concentrate on time in the saddle....
Keep on pedalling
