The stock sizes for the Seca II are as follows:
Stock sizes for Seca II rims:
- 110/80-17 Front
130/70-18 Rear
The Seca II came new with bias ply tires. It used to be that every manufacturer strongly advised NOT to switch to radials if the bike was designed for bias ply tires. I’m not sure that’s changed but a lot of folks have done it and I’ve yet to hear of any ill effects.
I’m sure are more models and sizes than these available, this is just what Chaparral had listed in their mailer...
Manufacturers, tires and available sizes:
Avon:
- Roadrider AM26 (Sport Touring bias ply)
110/70-17 Front
110/80-17 Front
120/80-18 Rear
120/90-18 Rear
130/70-18 Rear
130/80-18 Rear
140/70-18 Rear
150/70-18 Rear
AV55/AV56 (Ultra Sport Touring radial)
110/70-17 Front
150/70-18 Rear
160/60-18 Rear
Bridgestone:
- BT-023 (Sport Touring radial)
110/70-17 Front
160/60-18 Rear
Battlax BT-45 H (Sport Touring bias ply)
110/70-17 Front
120/80-18 Rear
130/70-18 Rear
Battlax BT-45 V (Sport Touring bias ply – “high performance”)
110/80-17 Front
130/80-18 Rear
140/70-18 Rear
140/80-18 Rear
150/70-18 Rear
Battlax BT-016 (Ultra High Perfomance Sport radial)
110/70-17 Front
150/70-18 Rear
160/60-18 Rear
Continental:
- Conti Go! (Sport Touring cross ply)
110/70-17 Front
110/80-17 Front
120/80-18 Rear
130/70-18 Rear
130/80-18 Rear
150/70-18 Rear
Dunlop:
- GT501 (Sport Touring bias ply)
110/80-17 Front
120/90-18 Rear
130/80-18 Rear
- Cruiser ST (Sport Touring bias ply)
110/70-17 Front
110/80-17 Front
130/70-18 Rear
130/80-18 Rear
Metzeler:
- Lasertec (Sport Touring bias ply)
110/70-17 Front
110/80-17 Front
120/90-18 Rear
130/70-18 Rear
130/80-18 Rear
Michelin:
- Pilot Activ (Sport Touring bias ply)
110/70-17 Front
110/80-17 Front
120/90-18 Rear
130/70-18 Rear
130/80-18 Rear
- Pilot Road 2 (Sport Touring radial)
110/70-17 Front
160/60-18 Rear
- Pilot Road 3 (Sport Touring radial)
110/70-17 Front
160/60-18 Rear
Pirelli:
- Sport Demon (Sport Touring bias ply)
110/70-17 Front
120/80-18 Rear
120/90-18 Rear
130/70-18 Rear
140/70-18 Rear
Shinko:
- 006 Podium (Sport radial)
110/70-17 Front
140/60-18 Rear
150/60-18 Rear
- SR740/741 (Sport Touring bias ply)
110/70-17 Front
110/80-17 Front
140/70-18 Rear