Garage Door Opener Rail Parts & Rail Extension Kits

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Replacement garage door opener rail parts for LiftMaster, Chamberlain, Genie, Marantec, Sommer, Linear and Hormann: belt caps, tensioners, chain spreaders, bullets, rail clamps, wire clips, complete rails and rail extension kits.

Find your brand in the guide below the products.

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Marantec 106141 Shaft Adapter for Belt and Chain Standard Rails
SKU: 106141
Rating:
100%
2 Reviews
$7.80 As low as $7.02
Genuine Marantec 106141 shaft adapter: the small part that…
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LiftMaster 41C76 Belt Sprocket Cover Kit (Belt Cap and Sprocket, 041C0076)
SKU: 41C76
Rating:
100%
2 Reviews
$14.69 As low as $13.22
Genuine LiftMaster 41C76 (041C0076) belt sprocket cover…
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Marantec 88824 Sprocket Holder Assembly
SKU: 88824
$43.50 As low as $39.15
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What does this mean?
Genuine Marantec 88824: the sprocket holder assembly at the…

Rail parts by brand

Brand	Rail parts
LiftMaster / Chamberlain	Belt drive: 41C76 belt cap and sprocket, 41A4371 belt cap retainer, 41B4103 belt tensioner, 29B130 belt connector. Chain drive: 41A4208-2 and 41A5615 chain spreader kits, 4A1008 master link. Square rail: 41A5665 rail, 41A7276 wear pads, 41D598-1 U bracket. Also 041A6550 rail clips, 197LM wire channel
Genie	Rail extension kits for 8' doors: EKCC chain, EKBC belt, EKSC screw. Bullets 37557R.S (chain) and 37556R.S (belt), 37857R.S tensioner, 37844R.S bearing block, 21019B04 rail clamp
Marantec	2-piece rails for 7', 8', 10', 12' and 14' doors; 8030196 belt connector kit, 96834 / 98875 tabs
Sommer	Rail extensions 9'9" and 11'6", 3' and 5'; US3123 side mount kit, ceiling brackets
Linear / Hormann	Linear HAE00019 wire clips, CSB center support; Hormann D436255 center support

Raising a door from 7' to 8'?

Many openers need a rail extension for an 8' door. Genie sells separate kits for chain, belt and screw drive rails (37301R, 37302R, 37303R). Rail length is based on door height, so check your opener's manual for the exact rail or extension kit.

Looking for the trolley? See carriages. Need a chain or belt? See chains and belts. Call 877-379-4947 with your opener model.

Frequently Asked Questions

What is the trolley on a garage door opener?

The trolley (Genie calls it the carriage) rides along the opener rail and connects to the door arm. Pulling the emergency release handle disconnects the outer trolley from the inner trolley, so you can move the door by hand; it re-engages when the opener runs.