"Lightweight by design"
Thunder "Optical" Lights feature:
Solid Axles
Hollow King Pin
Forged Light baseplate
90A durometer black bushings
Sold as a pair.
THUNDER SIZE CHART:
| Model | Axle Width | Deck Width |
| 143 | 7.125" | up to 7.4" |
| 145 | 7.62" | 7.4" - 7.9" |
| 147 | 8.0" | 7.9" - 8.12" |
| 148 | 8.25" | 8.12" - 8.38" |
| 149 | 8.5" | 8.38" - 8.62" |
| 151 | 8.75" | 8.62" - 8.85" |
| 161 | 9.125" | 8.9" & up |