Originally Posted by
DGozinya
83 miles total, but about 45 or so was on crushed limestone on the Wauponsee Trail. For me, my speeds went from 18-20's on pavement to 15-16's, so that's a start. But part was just being careful as I was out in BF with nobody around to help if a faceplant occurred.
Doesn't your speed drop answer the question? I rode 77 miles of crushed limestone for the first time last week, but did it on a single speed with 32c's. On pavement with my geared bike (23c's), 19 mph average. On the limestone, 15.4 mph average. Some of the drop was from the single speed, as the first half was done at 17 avg, the last half a tad over 14, due to wind conditions, but I think your numbers are par for mine.