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Roadmaster RM851 EM

View all 11/R-22.5 Tires
  • Part Number: 81634
  • Service Description: 144 L
  • Sidewall: BW
  • Load Range: G (14 Ply)
  • Applications: Long Haul,Mixed Service,Urban
  • SmartWay Verified
  • Type: Commercial Drive
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Roadmaster RM851 EM Overview

The tread compound is specifically formulated for fuel efficiency. The RM851(EM) is designed for regional to long haul applications. The solid shoulder provides long, even wear while the lugs provide the traction necessary for a drive position tire.

Features & Benefits

  • Smartway Verified Low Rolling Resistance Tire. Tire design and rubber compounding provide low tire rolling resistance and contribute to fuel efficiency.
  • Solid shoulder ribs provide even wear in long haul application, whilethe lugs provide traction in the wet and snow.
  • Stone ejectors in the bottom of the tread grooves protect the casing from stone penetrations.

Tire Specifications

RM851 EM Tire Specifications

Size UTQG Max. Load Inflation Pressure Tread Depth Rim Width Range Sect. Width Tread Width Overall Diam
11/R-22.5 N/A 6,173 lbs N/A 27/32nds 7.5-8.25" 11" N/A 42"

Purchase includes the Roadmaster RM851 EM tire only. The wheel rim shown in the picture is not included. Picture provided is a stock picture from the manufacturer and may or may not reflect the actual product being ordered.

All Roadmaster RM851 EM tires are continuously developing with manufactured improvements. With that said, Simple Tire and the manufacturers have the right to change these tire specifications at any time without notice or obligation.

If you have any questions, please email us at

Please Note: Specifications of the Roadmaster RM851 EM tires shown above are listed to be as accurate as possible based on the information provided to us by Roadmaster tires.

Available Sizes & Prices

RM851 EM Available Sizes & Prices

Size Serv. Desc. UTQG Sidewall Part Number Price Qty
11/R22.5 144L BW 81634 View Details
11/R22.5 144L BW 90000007289 View Details
11/R24.5 146L BW 90000007291 View Details
11/R24.5 146L BW 81654 View Details
285/75R24.5 144L BW 81645 View Details
285/75R24.5 144/141L TL 90000007292 View Details
295/75R22.5 144L BW 81653 View Details

Treadlife Warranty

RM851 EM Treadlife Warranty

This product is not covered by a manufacturer’s treadlife warranty.

Customer Support

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Ratings & Reviews

Roadmaster RM851 EM

Summary Customer Reviews


(Based on 3 Reviews)
Dry Wet Snow Comfort Noise Treadwear
5 .0
4 .0
4 .0
4 .0
4 .0
3 .0
I had MICHELIN drive tires before Roadmasters and they lasted me 238k/mi before they wore out and one blew up so I got 8 new RM for half of what 8 MICHELIN would cost me $5500 vs $2600 @PETRO service center. This tires lasted 235k/mi and and still had little life but I'm doing mostly heavy loads on a FLATBED so didnt want to take chances. So if you keep your eyes on the tire pressure they will do just as good as one of best brands.
These tires handle great in winter weather driving. Drove over 600 miles in 6+ inches of snow (loaded and empty) and never had a issue with lost traction (50-65 mph). Not sure on the fuel saving yet, since I changed trailers and tires at the same time. So far the tires are wearing evenly. Very good price for the tires through and they delivered the tires on time to the correct location. I will use for my next tire purchase. I only put 1 star for tread life, since I haven't had the tires long enough to know. I expect to get at least 200,000 miles from them.

Roadmaster RM851 EM 11/R-22.5

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