My son's Raleigh MTrax which is in almost-new condition (sadly due to non-use rather than fastiduous care!). It's 55cm centre to centre on both seat and top tubes (57cm centre to top seat tube). MTrax was a sub-brand created by Raleigh in the 1990s and they were made at the Special Products Division. This one is really well built and lightweight, equivalent to 531 I'd say. I'm guessing it has done no more than 500 miles in its entire life. It has braze-ons for two bottle cages, and downtube gear/cable guides. Headset, seatpin and square taper bottom bracket are included. It has mudguard eyes and would make a lovely Audax/sportive bike. Only problem is that the 'M' of the MTrax decal on the right side is misaligned and slightly torn. Very small number of scuffs and hardly any chips anywhere. £90 with sensible offers invited.