hi stumpy.nice bike mate.the reason to keep it to 100ish as a single is the bobbing of lots of suspension when muscling the bike uphill.your riding a singlespeed out of the saddle alot more than a geared bike so the front end needs to be low and as little bob as possible.with the u turns then switched back in long travel mode for the downhill go faster bits.i like singlespeed in the winter for low ish maintainance.come to think of it ive singlespad for the past god knows how many years year in year out.