Gear Mesh
When changing gears, be sure to set the gear mesh so it is not too tight or too loose. Refer to the XRAY M18 Instruction Manual for more information.
Gearing
Gearing changes the acceleration and top speed of your M18 so that you can tune it to your type of track or to achieve the speeds or runtimes you
desire.
You change your gearing by using different combinations of motor pinion and spur gears:
SPUR
GEAR
PINION
GEAR
FINAL
RATIO
ACCELERATION
SPEED
14
15
16
17
18
16
17
18
19
21
23
42
36
7.50
7.00
6.56
6.18
5.83
5.62
5.29
5.00
4.74
4.29
3.91
INTERNAL RA
TIO 1:2.5
AVAILABLE
OPTION
INCLUDED
WITH KIT
# 38 5701 – Composite Pinion Set (13,14,15,16)
# 38 5700 – Composite Pinion Set (17,19,21,23)
# 38 5742 – Spur Gear 42T
Small pinion/large spur: Faster acceleration, lower top speed, less strain on motor -
reduces chance of motor overheating, longer runtime
Large pinion/small spur: Slower acceleration, higher top speed, more strain on motor -
increases chance of motor overheating, shorter runtime
Graphite Chassis
Improves chassis stiffness and handling.
# 38 1111 – Micro Graphite Chassis – Blue
# 38 1112 – Micro Graphite Chassis – Silver
# 38 1115 – Micro Graphite Chassis – Black
# 38 1151 – Conversion Set for 300 Super Size Motor - Blue
Improves steering.
# 38 2106 – Set of Suspension Arms 6° Caster (2)
Improves durability and stiffness, increases steering
responsiveness.
# 38 2252 – Alu Suspension Blocks – Left
# 38 2262 – Alu Suspension Blocks – Right
Increases top speed and effi ciency, increases handling
‘aggression.’
# 38 3220 – Set of Rear Linkages 2.5° Toe-in (2)
Offers varying adjustment of front and rear toe.
# 38 3300 – Adjustable Turnbuckle Set for Toe-in Adjustment
CHASSIS & SUSPENSION
There are several chassis and suspension components that you change to improve the performance, handling, and looks of your M18.
13
Suspension Arms
Aluminum Suspension Blocks
Pre-set Rear Toe Linkages
Adjustable Linkages
Summary of Contents for M18 PRO
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