It’s a 1985 Raleigh Pursuit which I am looking to purchase, I believe it’s either a 23in or 25in but I don’t want to commit to buying without it being my correct size (58cm)
Bikes are measured by their seat tube length. This measurement is normally from the centre of the bottom bracket (BB) or the centre of the bolt that attachs the crank arms. This differs by brand, some measure to the top of where the top tube meets the seat tube, or even the centre of the top tube.
Knockgooffoot on
I would say that it is at least 60cm
ValuableAd7775 on
Looks like the 24inch to me, headtube is the easiest way to guess
Itchifanni250 on
Yes, about 60cm, another giveaway is head tube which suggests a quite large frame.
Jeffythebigwife on
True, though top tube length is more important. These old bikes were super tall, but reach is more of the issue.
EichelPiet on
58/60
yes13690 on
If your 6ft, and that’s a 60, it should fit you. You should test ride it, before you buy it.
The_Antisoialite on
Assuming a 700c rear wheel or 27.5 inches. Behind which the brick wall helps us as there are roughly 11 courses of brick if we imagine an additional row of brick at the bottom. so 27.5 inches divided by the 11 row of bricks gives us 2.5 inches per brick (including mortar). There seem to be roughly 9.5 rows of brick from the center of the BB to the top of the seat tube so that’s 2.5 x 9.5 gives us 23.75 inches or 60.235cm C to T. And from age 17 to now 57 that’s the size I have always ridden.
8 Comments
Bikes are measured by their seat tube length. This measurement is normally from the centre of the bottom bracket (BB) or the centre of the bolt that attachs the crank arms. This differs by brand, some measure to the top of where the top tube meets the seat tube, or even the centre of the top tube.
I would say that it is at least 60cm
Looks like the 24inch to me, headtube is the easiest way to guess
Yes, about 60cm, another giveaway is head tube which suggests a quite large frame.
True, though top tube length is more important. These old bikes were super tall, but reach is more of the issue.
58/60
If your 6ft, and that’s a 60, it should fit you. You should test ride it, before you buy it.
Assuming a 700c rear wheel or 27.5 inches. Behind which the brick wall helps us as there are roughly 11 courses of brick if we imagine an additional row of brick at the bottom. so 27.5 inches divided by the 11 row of bricks gives us 2.5 inches per brick (including mortar). There seem to be roughly 9.5 rows of brick from the center of the BB to the top of the seat tube so that’s 2.5 x 9.5 gives us 23.75 inches or 60.235cm C to T. And from age 17 to now 57 that’s the size I have always ridden.
Edit: Fixed Typos