I'm looking to cycle to Brighton and back next week on my fixed gear. I run 53-18 in London but will need something lighter if I'm going to make it down to the coast. I'd be hugely grateful if anyone has a 48t or 49t (144BCD) that I could use on loan but would be glad of a bargain if anyone has one for sale. Either 3/32 or 1/8 would be fine.
Many thanks : )