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193 messages, Last post on Sep 26, 2009 at 5:22 AM
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| This is my 1st jeep..99 sahara. It came with mud tires that are pretty well spent & want to put something that is good for road mostly, not so noisy & rough, it has 16" rims & 3" lift on it. What do you suggest??? | |
My '00 TJ was ordered with optional 30x9.50 R-15 GY GSA's on 15x8 alloy wheels. The factory tires were making "growling" noise and thumping when at cruising speed. Problem was diagnosed by mechanic, and concurred by tire dealer, as broken belts in 3 of 4 tires on ground. The GSA's slipped in the rain and offered no traction in the snow. The GSA's were replaced at 32,000 mi. in 2-'03 with 31x10.50 R-15 BFG AT K/O's (including spare). The BFG's were chosen due to positive experience with them on my previous '92 YJ. The 31's fit the TJ well, only minor tire rub on lower control arm when at full turn lock. Four 31's were replaced in12-'07 at 90,000 mi(balance & rotate at each oil change). It is a reasonable compromise to a highway tire and a mud tire. It also meets the Rubber Manufacturer's Assoc. Severe Snow Condition criteria and wears the mountain/snowflake badge on the side wall. Other tires that have this rating are the Goodyear Fortera TripleTred, General Grabber AT2, and ProComp All Terrain. Steering stabilizer and shock absorbers begin to fade around 50,000 miles. If not doing anything "extreme", the premium Gabriel or Monroe units will be a marked improvement over stock. Hope my rant helps.
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Replying to: matt1320 (Jun 27, 2008 5:06 pm) An excellent tire on virtually all surfaces, on and off road, wet or dry, except for deep or squishy mud. |
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I just bought a used 2003 Wrangler X....I'm a newbie to these multi-faceted man mobiles....for now. In anycase, my current tire size is the stock 215 75R15, and I'm thinking of upgrading to 31x10.5x15 without lift. Does anyone know what else needs to be done to ensure a smooth ride? I've heard the gear ratio will change and there is something we can do about that (a sensor in the transmission needs to be changed), but no one seems to know exactly what - - not even the JEEP Dealer!! Please elaborate if you know.....Thanks.
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Replying to: relgnarwpeej (Sep 18, 2008 3:22 pm) There is a speedometer gear you can change out. It is based on your tire size and your differential gearing. Likely you have 3.73 gearing in your differential. There are several speedometer gear charts/applications on the web that will tell you what you need. Generally, with a 1" change, it won't be a big deal as far as accuracy. http://www.teraflex.biz/tech/faq/speedometer-gear-chart/ I'm not sure what the stock tooth count is for a 3.73-geared TJ. Your invoice/build sheet will tell your stock gearing (assuming it hasn't been changed). As a comparison, I have an SE geared at 4.10 stock. I was on 30's and the speedo was off (geared for 28" tires). I regeared to 4.88 and added 33's. My speedo gear is actually more accurate than it was with the 30's.  -Paul
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Replying to: erickpl (Sep 19, 2008 5:12 am) When you say "regeared", do you mean just changing out the speedometer gear? Or is there some way to re-calibrate the speedometer to meet the demand of the bigger tires? By the way, where can I purchase a speedometer gear?
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Replying to: relgnarwpeej (Sep 20, 2008 12:59 pm) Another regear can take place in the speedometer gearing attached to the transfer case. THAT regearing will not affect power. All that does is make your speedometer reflect correct speed. It works in conjunction with your differential gearing and tire size to ensure proper speed and odometer readings. Usually you can get speedometer gears from the dealer from $15 to 30, depending on the number of teeth you need for your tire/gear setup. Given that you only have 31's on there right now, the effects of the larger tire size on power and speedometer accuracy would be minimal. If you have a handheld GPS, drive with it and see how your speed is on the GPS vs the speedo. Save the $$ if you can. Just a note, Rubicons use a different speedometer sensor and it is NOT a gear. It is electronically set and a bit more complicated to do. Here is a writeup for changing the speedometer gear yourself. It is VERY easy. http://www.4x4xplor.com/speedo.html -Paul |
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