>>1942092Pretty sure that's a medium or a large, but mountain bike sizing can be fucky and very similar.
I measured 2 of my older mtb(95 bontrager privateer, and a 87 fisher hoo koo e koo).
One measured bang on your specs which was the bontrager.
Hoo koo e koo had a longer seat tube by 2 cm and a longer top tube by like 1cm.
Back when I was getting my newer mountain bikes the sizes used to refer to seat tube length like 16.5in, 18in, 19in and 21in. However that got really messy with suspension and they use s/m/l/xl or other denominations.
I would look at both sizes medium or large, especially if it's old school since people can measure wrong and older bikes you have a fair amount of quill you can adjust, and lots of seatpost.
Oh, and even old bikes can have different geometry that influences handling. For instance on my 2 old bikes the hoo koo e koo descends better with a slacker headtube and a longer wheelbase+chainstay. However the bontrager is better in the tight and twisties.
Do realize if you are buying new gravel bikes replaced them.
>>1942093Bikes are easy to work on just be patient, consult youtube or ask for help, and take your time.
