Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×

Go Back   Montana Owners Club - Keystone Montana 5th Wheel Forum > GENERAL DISCUSSIONS > TIRES, Montana Tires
Click Here to Login

Thread Tools Search this Thread Display Modes
Old 09-30-2022, 07:13 PM   #1
Carl n Susan
Site Team
Carl n Susan's Avatar
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 6,535
M.O.C. #4831
Lug Centric v Hub Centric Wheel Balance

Occasionally a discussion arise about balancing RV tires and wheels. Some say "don't bother, you will never notice anything", and others say "absolutely balance them". Then the balance fans ask what kind of balance should I have done?" Here is a description I posted some time ago.

Hub Centric Vs. Lug Centric. Hub Centric Wheels are centered by the center bore of the wheel and the hub flange. Lug centric wheels are centered by the torque of the lug bolts; rather than the center bore of the wheel and the hub flange. There are two distinct types of wheels found on today's cars and light trucks

The easiest way to tell the difference between the two designs is to look at the hub of a hub and wheel assembly. If the hole in the center of the wheel fits snugly against the hub, then it is hub-centric. If there is a gap between the center hole of the wheel and the hub, then it is lug-centric.

Many of today's aftermarket wheels are Lug Centric in design. The center hole of a Lug Centric wheel is not the true center. These wheels cannot be properly mounted and accurately balanced using the normal cone mounting system that came with your wheel balancer.

Many Lug Centric wheels may appear to be mounted correctly with the center cone system, but they cannot be accurately balanced. The wheel balancer will continue to either "chase weights" or the wheel will show signs of imbalance when re-mounted on the vehicle.

To ensure an accurate balance, Lug Centric wheels must be mounted on the balancer through their lug bolt pattern. Lug Centric wheels, when mounted on the vehicle, are centered by the torque of the lug bolts and not the center bore of the wheel.

The only way to properly balance Lug Centric is through their lug bolt pattern. This style wheel must be mounted to the computer balancer in the same manner as it is mounted on the vehicle...through the lug bolt pattern.

Being a tire balance fan and having heard the Sailuns are heavy and hard to balance, I had all of mine balanced when I recently replaced them. I was in a hurry and couldn't find anyone around with a Lug Centric adapter, so I went with a Hub Centric balance. And sure enough they took a fair amount of weight
Click image for larger version

Name:	Wheel - Weights Hub Balanced.jpg
Views:	7
Size:	120.3 KB
ID:	13262

I removed one wheel and tire for another project and decided I would have that tire re-balanced with a Lug Centric adapter at a shop I found with the right knowledge and tools. I expected a little (maybe a lot less) weight would be needed. To my surprise they actually took even more weight. But the tech assured me they are dead on balanced. I will wait to see how this works out before I do all the other wheels. It does affirm my belief that the wheels and tires need to be balanced.

Click image for larger version

Name:	Lug Centered Balance.jpg
Views:	5
Size:	279.1 KB
ID:	13263
Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB

Carl n Susan is offline   Reply With Quote
Old 09-30-2022, 08:22 PM   #2
Montana Fan
Lee-CI's Avatar
Join Date: Dec 2021
Location: Northeast TX
Posts: 478
M.O.C. #30262
I remember this discussion well Carl. As I remember, the biggest issue was finding a knowledgeable shop with the prerequisite lug centric balancer equipment. I was taken aback to see how much weight it took to properly balance your tire / wheel combo. This definitely makes me suspect on the balance of our tires.....
Lee, Edith & Lil' Bit the furry feline alarm clock
2022 MHC 331RL, Surge Guard 35550, SumoSprings,TST 770, 200W base solar package
2022 Ram 3500 CC DRW 6.7 CTD, B&W Companion
Lee-CI is offline   Reply With Quote
Old 10-01-2022, 07:59 AM   #3
Montana Master
Daryles's Avatar
Join Date: May 2019
Location: Alton
Posts: 2,085
M.O.C. #24086
Thanks Carl, excellent write up.
I'm a believer in balancing tires. Next time I have mine off I'll check to see if the are hub-centric or lug-centric.
So far I have just been going with hub-centric balancing.
Daryl and Marianne,
2019 3130re 20th Anniversary Edition
2016 F350 Lariat
Daryles is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Powered by vBadvanced CMPS v3.2.3

This website is not affiliated with or endorsed by Montana RV, Keystone RV Company or any of its affiliates. This is an independent, unofficial site.

All times are GMT -6. The time now is 02:31 AM.

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2023, vBulletin Solutions, Inc.