That is probably Steve Abraham aka teethgrinder, a good bloke. Usually runs about 86" fixed, with big gears either for fun or specific training. It was good fun watching him climb during 2010's Mille Miglia, seated at 40 rpm solid as a rock.

You might be able to talk him into a fixed tandem ride at the next PBP, he was on the Brit triplet in 2003.