Moto Iron 18” × 2.5” Rear Scrambler Wheel for 1973-2003 Harley-Davidson Big Twin and SportsterMoto Iron 18 2. 5 Rear Scrambler Wheel for 1973 2003 Harley Davidson Big Twin and Sportster If you're looking to run enduro tires (or full knobbies!) on a scrambler or building a leggy looking chopper, an 18" rear wheel is an excellent choice. In the case of the scrambler, it permits use of aggressive tires, and in the case of the chopper, it nets that tall, lean look seen on Sportsters and early Big Twins. Manufactured to meet or exceed OEM