1 "Upswept (15 degrees) Hoop Extra Lang is of course extra tough, such an upswept hope, certainly in combination with a Brat seat, which we also offer with the same 15 degree increase.
The hoop is made of 1" thick steel, which corresponds to a diameter of 25.4 mm.
1 = about 160 mm
2 = about 185 mm
3 = about 210mm
Please feel free to email us if you need more information :)