Chain is as loose as a whores cod piece, having just done 1,400 miles around the west coast of bonny scotland last week


Have a huge stretched piece on my chain and to top it off today tried adjusting my chain and a fricking chain adjuster snapped

Question is should I buy a 108 link chain and adjust wheen way back, thus, lengthing my wheel distance, or, go with 106 and maybe have more adjustment if it stretches abit?
Cheers, in advance.
P.S. Any meet ups this summer in the middle of our fair land?