Tire Question...12R22.5
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10-12-2006, 04:05
Post: #9
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Tire Question...12R22.5
Hi John, you have already received several answers to your inquiry; however,
I thought that I would add a few additional thoughts. I believe that what you are thinking of doing would not only be ill advised but may be downright dangerous. From my years as a tire engineer and with Aâ Weigh We Go weighing coaches including many Bluebirds (my own PT-36 included) I have knowledge that most all late 90s Birds are very close to their maximum GVWR or GAWR as delivered and many are over that critical (and legally enforceable) limit when operated. For that reason based on the lessor ability to carry a load the 11R tires are in no way suitable for use on your 98 LX. The actual load capability for the 12R and 11R are #6610/7390 & #6780/6005 (single/dual) respectively, thus, you can see that there is a major reduction in the tires carrying capacity, probably less that your coach requires. On the slim chance that your specific coach might be unusually light where the 11R could carry the weight it will require an increase in tire pressure to do so, something that most RVers hate to do because of the ride quality reduction that accompanies higher tire pressures. In addition there is a approximately a .75â radius reduction (affecting your computers and dash readouts) along with a .80â reduction in tread width with a corresponding reduction in tire footprint area (which will increase wear, decrease steering power and decrease stopping power); finally while your current rims will probably be OK to use they are not optimal for the 11R (9:00 vs. 8:25) a fact which will also compromise somewhat the total tire performance Do not listen to those who are not unbiased experts in just what tires are required for RV usage. Remember also that RV are the only vehicle on the road that âoperates at 100% of its capability 100% of the tire.â Tires are no place to compromise; there are some very important people on board your coach. Do the right thing and have your coach weighed properly, wheel-by-wheel as is done by the RVSEF, only then will you be able to make sound judgments re: tires, pressures, etc. If you have any other questions or if I have misread your original question please do not hesitate to ask additional questions. Regards, Neil LeKander Author âThe RVerâs Ultimate Survival Guideâ author@... -----Original Message----- From: WanderlodgeForum@yahoogroups.com [mailto:WanderlodgeForum@yahoogroups.com]On Behalf Of John Sent: Wednesday, October 11, 2006 6:44 PM To: WanderlodgeForum@yahoogroups.com Subject: [WanderlodgeForum] Tire Question...12R22.5 I have started looking for new tires for our coach as it has the origional tires on it. While they are showing no cracking at all, I am still concerned about their age and would like to start swapping them out before I have to do it from the side of the road. The current tires are 12R22.5 which seems to be a lot more uncommon than 11R22.5s(which I run on my dump truck). From talking to a couple tire people they say the 11R22.5 are a little smaller(shorter). Has anyone switched from the 12s to the 11s? Any recomendations on a particular brand? Thanks, John Cassel 98 Wanderlodge LX [Non-text portions of this message have been removed] |
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Messages In This Thread |
Tire Question...12R22.5 - John - 10-11-2006, 13:44
Tire Question...12R22.5 - pattypape - 10-11-2006, 14:23
Tire Question...12R22.5 - John - 10-11-2006, 14:45
Tire Question...12R22.5 - krminyl@... - 10-11-2006, 15:12
Tire Question...12R22.5 - birdshill123 - 10-11-2006, 15:54
Tire Question...12R22.5 - John - 10-11-2006, 23:05
Tire Question...12R22.5 - Gregory OConnor - 10-12-2006, 01:06
Tire Question...12R22.5 - mbulriss - 10-12-2006, 03:25
Tire Question...12R22.5 - Neil & Pat - 10-12-2006 04:05
Tire Question...12R22.5 - pattypape - 10-12-2006, 04:21
Tire Question...12R22.5 - Neil & Pat - 10-12-2006, 05:24
Tire Question...12R22.5 - Ron & Patty - 10-12-2006, 06:10
Tire Question...12R22.5 - Joe Hagan - 10-12-2006, 06:17
Tire Question...12R22.5 - smquandt - 10-12-2006, 06:43
Tire Question...12R22.5 - birdshill123 - 10-12-2006, 07:26
Tire Question...12R22.5 - pattypape - 10-12-2006, 11:39
Tire Question...12R22.5 - John - 10-12-2006, 12:01
Tire Question...12R22.5 - dthollis1961 - 10-12-2006, 13:25
Tire Question...12R22.5 - birdshill123 - 10-12-2006, 15:25
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