This particular Finnish Tunturi is now living a new life as a single speed. I drove with it myself for a two years. A bit heavy being from'79, but was fun and didn't have to care about the mud and sand all over. 24 1/2" frame. Saddle post only 21mm and with plastic muff 24mm. So bike looked sometimes like the post was bent backwards under some users, especially if the frame was too small for the driver and post was lifted to the max. And sometimes that saddle post being really really long, like 15".