Choosing a 32-tooth sprocket for a motorized bike can improve top speed, reduce engine strain, and optimize gear ratios across common 49cc to 80cc engines. The right 32T rear sprocket must match the chain type (415 or 415H), bolt pattern (9-hole, 6-hole, or 3-hole), and hub compatibility. This guide highlights five well-regarded 32-tooth sprockets designed for motorized bicycles, detailing fitment, mounting options, and installation considerations. Use the summary table to compare key specs at a glance, then explore each product section for in-depth notes. All picks are compatible with standard 9-hole mounting kits and various wheel hubs.
| Product | Brand | Teeth | Fitment Notes |
|---|---|---|---|
| Sthus 32T Chain Wheel Sprocket | sthus | 32 | Fits 49cc-80cc; 9-hole mounting kit |
| JRL Wheel Sprocket 32T | JRL | 32 | Fits 49cc-80cc; 9-hole mounting kit; CNC 3-hole option; rear hub compatibility |
| DONSP1986 32 Teeth Sprocket | DONSP1986 | 32 | 9/6/3 holes; 135mm length; 37mm center hole; 415 chain compatible |
| CDHPOWER 32 Teeth Sprocket + Installation Set | CDHPOWER | 32 | 9/6/3 holes; 37mm center hole; fits 415 and 415H chains |
| Cylemoto 32T Sprocket For 415 Chain | Cylemoto | 32 | Fits 415 chain; 9-hole mount kit; 36mm center hole; 134mm outer diameter |
Sthus 32T Sprocket For Motorized Bikes
Features: Fit: 49cc 50cc 66cc 80cc Motorized Bicycle Bike Moped. Package includes: 1x sprocket. Use for rear sprocket mounting pads kits and 9-hole sprocket mounting kit. This sprocket is designed to work with standard 415-chain setups commonly found on small-displacement motorized bikes.
JRL 32T Sprocket For Motorized Bikes
Features: Fit 49cc 50cc 66cc 80cc Motorized Bicycle Bike Moped. Includes 1x sprocket; compatible with 415 chain. Supports rear sprocket mounting pads kits with 9-hole mount kit and CNC 3-hole options; suitable for rear hub disc brake ball bearings in some builds.
DONSP1986 32 Teeth Sprocket For 415 Chain
Features: Multifunctional high-performance 32-teeth sprocket with 9 holes, 6 holes, and 3 holes. Length: 135mm; Thickness: 4mm; Center hole diameter: 37mm; Hole-to-hole spacing 44mm. Compatible with 415 chain and can work with installation kits for 9-hole rear mounting; suitable for adapters to bike rear hubs and for aluminum wheels.
CDHPOWER 32 Teeth Sprocket With Installation Set
Features: Multifunctional high-performance 32-teeth sprocket with 9 holes, 6 holes, and 3 holes. Center hole diameter: 37mm. Works with both #415 and #415H chains. Aligns well with the wheel using a 9-bolt pattern; installation set simplifies mounting on compatible rear hubs and wheels.
Cylemoto 32T Sprocket For 415 Chain
Features: Includes a 32T sprocket compatible with 415 chain across 49cc-80cc motorized bicycles. Notes include verification of shaft size and chain size before purchase, compatibility with 9-hole mounting kits, rear sprocket mounting pads, CNC 3-hole sprockets, and rear hub disc brakes. Center hole diameter about 36mm; outer diameter about 134mm; designed for standard motorized bike builds.
Buying Guide
Key purchase considerations help ensure the right 32T sprocket for your motorized bike:
- Chain compatibility: Most 32T sprockets are designed for 415 chain types, with some models also supporting 415H. Confirm your chain type before buying.
- Bolt/mount patterns: The common patterns are 9-hole, 6-hole, and 3-hole adapters. Verify your wheel hub and mounting kit supports the pattern listed by the sprocket.
- Center hole diameter: The center bore should fit snugly around your bike’s crank spindle or rear hub. Typical measurements range around 37 mm (some models around 36–37 mm).
- Length and spacing: Some sprockets specify overall length (e.g., 135 mm) and hole-to-hole spacing to match your installation kit and wheel width.
- Hub compatibility: If using rear-disc or ball-bearing hubs, check whether the sprocket’s hole pattern accommodates your hub type or requires an adapter.
- Material and durability: Look for solid steel or alloy sprockets with robust mounting holes to resist wear in high-RPM environments.
- Installation effort: Some sets include installation hardware or mounting pads; others require separate components. Assess whether you need a full installation set.
- Future upgrades: If you plan to upgrade other components (carburetor, exhaust, or intake), a 32T sprocket with flexible hole options can better complement tuned engines.
Across the options above, the chosen 32T sprockets emphasize compatibility with standard 9-hole installation kits and a range of 49cc–80cc motorized bike configurations. When selecting, compare hole patterns, center bore size, and chain compatibility to ensure a secure, efficient fit that enhances your gearing without introducing undue mechanical stress.