Biking with a dirty back

[Bombay]

(07-07-2019, 09:07 AM)CharleyFarley Wrote:  I'd guess it has more to do with the tire tread pattern than the geometry, although if your saddle was closer to the vertical line of the tire's furthest point, than your girlfriend's bike, it might make a bit of difference. Or it could be that the muck just took a liking to you!

thanks for the reply. I'll take pics of the patterns once I'm back from the holidays. Also will check the distance, perhaps that's actually the case It's just that typically wet back (the nasty brown line, ha) and especially the area around the lower back is unavoidable during such wet ride. This was an unusual case.