In very loose conditions, these new gears can be used for under/over drive. Overdrive is only recommended in rare situations where traction is very low.
OD with 13/43 and 14/47 = 1.484% (13/43 goes in front)
OD with 13/43 and 12/40 = 0.7724% (13/43 goes in front)
OD with 12/40 and 14/47 = 0.7116% (12/40 goes in front)
These new gears must be used with their counterparts. For instance, TKR9151B must be used with TKR9153B and TKR9151C must be used with TKR9153C.
| Current 2.x | 12t Pinion (TKR9153) 40t Ring (TKR9151) FDR: 12.3077 |
Included with EB/NB48 2.x. Most punch but more rolling resistance off power. Good for smaller tracks with more 180’s. Also good for tracks with short run ups to jumps out of corners. |
| New | 13t Pinion (TKR9153B) 43t Ring (TKR9151B) FDR: 12.2130 |
Reduced wheelspin on loose tracks. Less punch but smoother than 12/40 gears. Best balance. Recommended for larger/high speed tracks with more sweepers. |
| New | 14t Pinion (TKR9153C) 47t Ring (TKR9151C) FDR: 12.3956 |
Smoothest acceleration, least rolling resistance, improved corner speed for sweeping corners. Nearly a direct replacement for 12/40 gears but with improved tooth engagement. |
