Furthest you've ridden fixed is...

I was sure I was going to do Dunwich fixed until yesterday. Did 50 miles inc a few laps of Richmond park but got frustrated by my top speed being limited on the downhills; and if I went for a higher gear I'd worry about getting up the hills. Might get a road bike for that.

There's only one longish downhill on DD anyway. Getting a road bike to ride it is a sure sign of weakness and probable impending death from girlsblouseitis.