10 Best Chain Tensioner of December 2025

• Chain Tensioner Spring Loaded For 49cc 66cc 80cc Engine Motorized Bike
• Package Include: 1 x Chain Tensioner Kit
• 80cc bike chain tensioner
• motorized bike chain tensioner

sthus

• Razor Replacement Chain Tensioner with Spring for the Razor MX500 and MX650 Dirt Rockets
• 606 Bearings, Spring and Nut included.
• MFG Part Number: W15128190079

Razor

• For use with vertical drop-out frames

SHIMANO

• Fitment:Fit:49cc 60cc 80cc Motorized Bicycle Bike
• Package include: 1* Pulley Chain Tensioner Bracket
• Weight:300g
• NOTE:This is the Non-original part. The pictures can tell more than we can; please make sure it can fit on your bicycle before ordering it.

JRL

• Heavy duty chain roller tensioner with upgraded spring, thicker wire and longer travel
• The bracket use 3.2mm thick metal, stronger built than other tensioners.
• The kit comes with an extra roller as spare parts.
• Seamless steel bushing brings smooth rotoring and longer life.
• 14mm inner diameter mounting bushing size, please see photos for detail measurements.

Wingsmoto

• Razor E200 (V36+) Chain Tensioner
• Replacement Chain Tensioner for the Razor E200 Scooter V36+
• Razor Part # W13112430079
• Not Compatible with the E100 or the E300. Works ONLY with the Razor E200 Series.

Razor

• 4339
• 785749816852

SE BIKES

• Razor original replacement E300 Chain Tensioner (Version 36+)
• Works with the following: Razor E300, E300S, E325, E325S

Razor

• Fits 3/8 Axles
• Lightweight, compact design
• Forged alloy construction
• Chromoly bolt

Origin8

• Aftermarket Parts High Performance
• Chain Adjuster Tensioner Guide with Backup Long Bolts Universal Dirt Pit Bike Motorcycle
• Package Include:1 x Chain Tensioner with bolts,4 x 30mm length bolt by free
• Automatic tensioning motorcycle chain, reduced wear and prolong the service life of chains

RuTu