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Sprockets > #40, #41, and #420 Sprockets > Freewheel Sprockets

Freewheels Sprockets for #40, #41, and #420 Chain

Freewheel Sprockets, Freewheels, and Axle Adapters
All of the freewheel sprockets, freewheels, and freewheel to axle adapters
on this page are 100% compatible and interchangeable with each other.
Freewheel
Sprockets
Freewheel
Clutches
Freewheel to Axle
Adapters
Freewheel
Tools

Freewheel Sprockets
These freewheel sprockets are machined on an individual order basis so please allow a few extra days of processing time when ordering these sprockets.


30 Tooth Freewheel Sprocket for #40, #41, and #420 Chain
30 tooth sprocket for #40, #41, and #420 chain. 5.057" OD, 2.125" ID, 2.638" bolt circle diameter, five equally spaced 5.2mm ID mounting holes for M5x0.8 bolts. Compatible freewheel clutch item # FWM-205 sold below. Made of aircraft-grade tempered (hardened) aluminum alloy.
Item # SPR-42030F5
$38.95


32 Tooth Freewheel Sprocket for #40, #41, and #420 Chain
32 tooth sprocket for #40, #41, and #420 chain. 5.376" OD, 2.125" ID, 2.638" bolt circle diameter, five equally spaced 5.2mm ID mounting holes for M5x0.8 bolts. Compatible freewheel clutch item # FWM-205 sold below. Made of aircraft-grade tempered (hardened) aluminum alloy.
Item # SPR-42032F5
$38.95


35 Tooth Freewheel Sprocket for #40, #41, and #420 Chain
35 tooth sprocket for #40, #41, and #420 chain. 5.855" OD, 2.125" ID, 2.638" bolt circle diameter, five equally spaced 5.2mm ID mounting holes for M5x0.8 bolts. Compatible freewheel clutch item # FWM-205 sold below. Made of aircraft-grade tempered (hardened) aluminum alloy.
Item # SPR-42035F5
$39.95


40 Tooth Freewheel Sprocket for #40, #41, and #420 Chain
40 tooth sprocket for #40, #41, and #420 chain. 6.653" OD, 2.125" ID, 2.638" bolt circle diameter, five equally spaced 5.2mm ID mounting holes for M5x0.8 bolts. Compatible freewheel clutch item # FWM-205 sold below. Made of aircraft-grade tempered (hardened) aluminum alloy.
Item # SPR-42040F5
$44.95


45 Tooth Freewheel Sprocket for #40, #41, and #420 Chain
45 tooth sprocket for #40, #41, and #420 chain. 7.451" OD, 2.125" ID, 2.638" bolt circle diameter, five equally spaced 5.2mm ID mounting holes for M5x0.8 bolts. Compatible freewheel clutch item # FWM-205 sold below. Made of aircraft-grade tempered (hardened) aluminum alloy.
Item # SPR-42045F5
$49.95


50 Tooth Freewheel Sprocket for #40, #41, and #420 Chain
50 tooth sprocket for #40, #41, and #420 chain. 8.247" OD, 2.125" ID, 2.638" bolt circle diameter, five equally spaced 5.2mm ID mounting holes for M5x0.8 bolts. Compatible freewheel clutch item # FWM-205 sold below. Made of aircraft-grade tempered (hardened) aluminum alloy.
Item # SPR-42050F5
$54.95


55 Tooth Freewheel Sprocket for #40, #41, and #420 Chain
55 tooth sprocket for #40, #41, and #420 chain. 9.044" OD, 2.125" ID, 2.638" bolt circle diameter, five equally spaced 5.2mm ID mounting holes for M5x0.8 bolts. Compatible freewheel clutch item # FWM-205 sold below. Made of aircraft-grade tempered (hardened) aluminum alloy.
Item # SPR-42055F5
$59.95


60 Tooth Freewheel Sprocket for #40, #41, and #420 Chain
60 tooth sprocket for #40, #41, and #420 chain. 9.841" OD, 2.125" ID, 2.638" bolt circle diameter, five equally spaced 5.2mm ID mounting holes for M5x0.8 bolts. Compatible freewheel clutch item # FWM-205 sold below. Made of aircraft-grade tempered (hardened) aluminum alloy.
Item # SPR-42060F5
$62.95


65 Tooth Freewheel Sprocket for #40, #41, and #420 Chain
65 tooth sprocket for #40, #41, and #420 chain. 10.796" OD, 2.125" ID, 2.638" bolt circle diameter, five equally spaced 5.2mm ID mounting holes for M5x0.8 bolts. Compatible freewheel clutch item # FWM-205 sold below. Made of aircraft-grade tempered (hardened) aluminum alloy.
Item # SPR-42065F5
$64.95


70 Tooth Freewheel Sprocket for #40, #41, and #420 Chain
70 tooth sprocket for #40, #41, and #420 chain. 11.433" OD, 2.125" ID, 2.638" bolt circle diameter, five equally spaced 5.2mm ID mounting holes for M5x0.8 bolts. Compatible freewheel clutch item # FWM-205 sold below. Made of aircraft-grade tempered (hardened) aluminum alloy.
Item # SPR-42070F5
$69.95


75 Tooth Freewheel Sprocket for #40, #41, and #420 Chain
75 tooth sprocket for #40, #41, and #420 chain. 12.230" OD, 2.125" ID, 2.638" bolt circle diameter, five equally spaced 5.2mm ID mounting holes for M5x0.8 bolts. Compatible freewheel clutch item # FWM-205 sold below. Made of aircraft-grade tempered (hardened) aluminum alloy.
Item # SPR-42075F5
$72.95


80 Tooth Freewheel Sprocket for #40, #41, and #420 Chain
80 tooth sprocket for #40, #41, and #420 chain. 13.026" OD, 2.125" ID, 2.638" bolt circle diameter, five equally spaced 5.2mm ID mounting holes for M5x0.8 bolts. Compatible freewheel clutch item # FWM-205 sold below. Made of aircraft-grade tempered (hardened) aluminum alloy.
Item # SPR-42080F5
$74.95


85 Tooth Freewheel Sprocket for #40, #41, and #420 Chain
85 tooth sprocket for #40, #41, and #420 chain. 13.823" OD, 2.125" ID, 2.638" bolt circle diameter, five equally spaced 5.2mm ID mounting holes for M5x0.8 bolts. Compatible freewheel clutch item # FWM-205 sold below. Made of aircraft-grade tempered (hardened) aluminum alloy.
Item # SPR-42085F5
$76.95


90 Tooth Freewheel Sprocket for #40, #41, and #420 Chain
90 tooth sprocket for #40, #41, and #420 chain. 14.618" OD, 2.125" ID, 2.638" bolt circle diameter, five equally spaced 5.2mm ID mounting holes for M5x0.8 bolts. Compatible freewheel clutch item # FWM-205 sold below. Made of aircraft-grade tempered (hardened) aluminum alloy.
Item # SPR-42090F5
$79.95

Freewheel Clutches


5-Hole Freewheel with 1.375" x 24 TPI Right Hand Threads
5-hole bicycle freewheel clutch with 1.375" x 24 TPI right hand (clockwise) threads. 2.125 OD sprocket mounting flange, 2.638" bolt circle diameter. Five sprocket mounting holes with M5x0.8 threads. Compatible with all sprockets and axle adapters sold on this page. 1.375" x 24 TPI (ISO) threads are used on virtually all modern bicycle wheels.
Item # FWM-205

$19.95


Sprocket Mounting Bolts and Locknuts for 5-Hole Freewheels
Set of five quantity M5x0.8 x 14mm long bolts and M5x0.8 locknuts. Compatible with freewheel item # FWM-205 sold above.
Item # HDW-200

$2.95

Freewheel to Axle Adapters

For Metric Diameter Axles


Freewheel to Axle Adapter with Right Hand Threads for 20mm Axle
Freewheel adapter with 1.375" x 24 TPI right hand (counterclockwise) threads. 20mm ID, 0.9" wide, 6mm keyway, Two set screws, Made from zinc plated steel. Compatible with 5-hole freewheel item number FWM-205 sold above.
Item # FWM-ADAPTER20

$24.95


Freewheel to Axle Adapter with Right Hand Threads for 15mm Axle
Freewheel adapter with 1.375" x 24 TPI right hand (clockwise) threads. 15mm ID, 0.9" wide, 4mm keyway, Two set screws, Made from zinc plated steel. Compatible with 5-hole freewheel item number FWM-205 sold above.
Item # FWM-ADAPTER15

$24.95


4mm x 4mm x 25mm Axle Key
4mm x 4mm x 25mm steel axle key for freewheel to axle adapters with 4mm keyway.
Item # KEY-4425

$0.95


6mm x 6mm x 25mm Axle Key
6mm x 6mm x 25mm steel axle key for freewheel to axle adapters with 6mm keyway.
Item # KEY-6625

$0.95

For Standard Diameter Axles


Freewheel to Axle Adapter with Right Hand Threads for 1" Axle
Freewheel adapter with 1.375" x 24 TPI right hand (clockwise) threads. 1" ID, 0.9" wide, 1/4" keyway, Two set screws, Made from zinc plated steel. Compatible with 5-hole freewheel item number FWM-205 sold above.
Item # FWM-ADAPTER1

$24.95


Freewheel to Axle Adapter with Right Hand Threads for 3/4" Axle
Freewheel adapter with 1.375" x 24 TPI right hand (clockwise) threads. 3/4" ID, 0.9" wide, 3/16" keyway, Two set screws, Made from zinc plated steel. Compatible with 5-hole freewheel item number FWM-205 sold above.
Item # FWM-ADAPTER3

$24.95


Freewheel to Axle Adapter with Right Hand Threads for 5/8" Axle
Freewheel adapter with 1.375" x 24 TPI right hand (clockwise) threads. 5/8" ID, 0.9" wide, 3/16" keyway, Two set screws, Made from zinc plated steel. Compatible with 5-hole freewheel item number FWM-205 sold above.
Item # FWM-ADAPTER8

$24.95


3/16" x 3/16" x 1" Axle Key
3/16" x 3/16" x 1" steel axle key for freewheel to axle adapters with 3/16" keyway.
Item # KEY-316X1

$0.95


1/4" x 1/4" x 1" Axle Key
1/4" x 1/4" x 1" steel axle key for freewheel to axle adapters with 1/4" keyway.
Item # KEY-104X1

$0.95

Freewheel Tools


Four Notch Freewheel Removal Tool
Freewheel removal tool for both 4-notch and 8-notch freewheels. Works with freewheel clutch item # FWM-205 sold above. Professional quality tool made from nickel plated forged steel. Can be used to install freewheels however freewheels can be installed by hand and then tightened by the motor the first time that the vehicle is used.
Item # FWM-400
$9.95

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