running lower rpm?

[Arct1k]

How much is too much? 22/66 on emaxx trans revo?

Differential Ratio: 2.8461538461538462
Transmission Ratio: 1.7222222222222223
Other Ratio: 1
Spur Tooth Count: 66
Pinion Tooth Count: 22
Total Voltage: 14.8
Motor KV: 1853
Tire Diameter (inches): 5.8
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0.0092
Spur/Pinion Ratio: 3 : 1
Total Ratio: 14.70513 : 1
Tire Circumference (inches): 18.22 inches (462.82 mm)
Total Motor Speed: 27424.4 RPM
Vehicle Speed: 32.18 mph (51.69 km/h)
Effective Speed Rate: 2.17 mph/V (3.49 kmh/V)
Estimated Adjusted Speed: 31 mph (50 km/h) - 4% loss
Effective KV Value: 1853

and I just got this for my HB LSP - Hybrid outrunner 41mm / 60mm long:

Differential Ratio: 4.3
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 46
Pinion Tooth Count: 18
Total Voltage: 16.5
Motor KV: 1600
Tire Diameter (inches): 6
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0
Spur/Pinion Ratio: 2.56 : 1
Total Ratio: 10.98889 : 1
Tire Circumference (inches): 18.85 inches (478.78 mm)
Total Motor Speed: 26400 RPM
Vehicle Speed: 42.88 mph (68.89 km/h)
Effective Speed Rate: 2.6 mph/V (4.17 kmh/V)
Estimated Adjusted Speed: 40 mph (65 km/h) - 6% loss
Effective KV Value: 1600

Reason for smaller can is i flipped the diff on the LSP so only have 75mm clearance so too tight for an XL can and can't run to a neu atm...