Pace RC303 Mountain bike frame. T6 6066 Aluminium tubing. 17 3/4 centre of bottom bracket to top of seat tube. 14 centre bottom bracket to centre of top tube. 20 3/4 top tube centre to centre. There are a few age related marks as expected from a used mountain bike. Thank you for looking at our item. Please check out my other car and bike parts. We strive to offer fair and competitive pricing on all our items; therefore, we do not accept offers. We appreciate your understanding and kindly ask that messages regarding price negotiations not be sent, as they will not receive a response. Please ask for a quote if you live in the Highlands or Islands.