2000 Z71 tire upgrade?
Question:
Cool. Hope you don’t get any tickets. Jon
> Can U say BrainFart? I was off on that one., That is correct, the > larger the tires, the farther they travel per revolution thereby > making the speedo show less than your actual speed. Guess I have just > been lucky with the tickets. Oh well, sorry for the bad info.
– Hide quoted text — Show quoted text -> Yes, that’s what I thought. So why did "derek" say that oversize tires > showed MORE on the speedometer than actual speed, thereby saving (he thinks) > him on some speeding tickets? Derek? > Jon Larsson > > That is absolutely correct, Jonathan. I will try to explain best I can. > > Your speedometer measures the speed (RPM’s) of the driveshaft, basically, > > and is calibrated for your correct rear-end gears and tire size. When you > > put bigger tires on, the speedometer still reads how fast the driveshaft > is > > turning, but since the bigger tires take you farther per revolution due to > > the larger circumference, you are actually going faster than what the > speedo > > reads. Hope this helps. > > highrider71 > > > I have always thought that oversize (in diameter) tires cause your > > > speedometer to read _less_ than your actual speed. Is this not so? If > > > not – why not? > > > Jon Larsson > > > > Bert, > > > > I have the stocker aluminum alloy wheels and put 285/75/16 bfg ATs on > > > > it. I found that the power difference is so small that it wasn’t even > > > > in the equation. I have no trouble getting off the line and the extra > > > > width actually seems to plant the tires better so there is less > > > > spinning. The speedo is a little off, but not too bad. It’s about > > > > 4mph at 75mph from what I can tell and of course, the indicated speed > > > > is faster than the actual speed so that may save me some $$ on > > > > tickets. I have no trouble with rubbing except, when in reverse with > > > > the wheels turned hard right or left. The bottom of the inner fender > > > > well catches on the corner of the tread and makes a horrific noise. I > > > > trimmed 1.5" tall and about 5" wide off of the bottom of the inner > > > > fenderwell and do not have any trouble. Can’t even tell it’s trimmed > > > > when the truck is at "normal" resting position. Seems like if you get > > > > the rubber, then you can just mark the fenderwells if they rub and > > > > trim a little off. Maybe mine sits lower too (25k Miles) and you may > > > > not have any rubbing at all. Definitely get the rubber though since > > > > the stockers look too small.
Response:
Can U say BrainFart? I was off on that one., That is correct, the larger the tires, the farther they travel per revolution thereby making the speedo show less than your actual speed. Guess I have just been lucky with the tickets. Oh well, sorry for the bad info. – Hide quoted text — Show quoted text -> Yes, that’s what I thought. So why did "derek" say that oversize tires > showed MORE on the speedometer than actual speed, thereby saving (he thinks) > him on some speeding tickets? Derek? > Jon Larsson > That is absolutely correct, Jonathan. I will try to explain best I can. > Your speedometer measures the speed (RPM’s) of the driveshaft, basically, > and is calibrated for your correct rear-end gears and tire size. When you > put bigger tires on, the speedometer still reads how fast the driveshaft > is > turning, but since the bigger tires take you farther per revolution due to > the larger circumference, you are actually going faster than what the > speedo > reads. Hope this helps. > highrider71 > > I have always thought that oversize (in diameter) tires cause your > > speedometer to read _less_ than your actual speed. Is this not so? If > > not – why not? > > Jon Larsson > > > Bert, > > > I have the stocker aluminum alloy wheels and put 285/75/16 bfg ATs on > > > it. I found that the power difference is so small that it wasn’t even > > > in the equation. I have no trouble getting off the line and the extra > > > width actually seems to plant the tires better so there is less > > > spinning. The speedo is a little off, but not too bad. It’s about > > > 4mph at 75mph from what I can tell and of course, the indicated speed > > > is faster than the actual speed so that may save me some $$ on > > > tickets. I have no trouble with rubbing except, when in reverse with > > > the wheels turned hard right or left. The bottom of the inner fender > > > well catches on the corner of the tread and makes a horrific noise. I > > > trimmed 1.5" tall and about 5" wide off of the bottom of the inner > > > fenderwell and do not have any trouble. Can’t even tell it’s trimmed > > > when the truck is at "normal" resting position. Seems like if you get > > > the rubber, then you can just mark the fenderwells if they rub and > > > trim a little off. Maybe mine sits lower too (25k Miles) and you may > > > not have any rubbing at all. Definitely get the rubber though since > > > the stockers look too small.
Response:
Thanks for all the good info I will probably go with the 285/75/16 yoko geolanders. From what I have read they might rub a little but this can easily be taken care of with a little trimming. The truck sure does need more rubber. Thanks again
– Hide quoted text — Show quoted text -> I have 285/75/16 BFG AT’s on the stock alloy wheels on my 2000 z71 > x-cab.no problems at all with rubbing, though i haven’t been into any > really rough stuff since putting them on. I don’t feel that the > wheels are too narrow. I run them at about 35PSI and they are fine. >does anyone know what the largest tire you can put on a 2000 Z71 extented >cab. Stock truck not lifted
Response:
The 285’s fit great, I have a 1999 GMC Z71 new body style and I love the tires, I am running BFG AT’s. They look and ride great. Good luck with the new tires. — -Dale – Hide quoted text — Show quoted text -> Yes, that’s what I thought. So why did "derek" say that oversize tires > showed MORE on the speedometer than actual speed, thereby saving (he thinks) > him on some speeding tickets? Derek? > Jon Larsson > That is absolutely correct, Jonathan. I will try to explain best I can. > Your speedometer measures the speed (RPM’s) of the driveshaft, basically, > and is calibrated for your correct rear-end gears and tire size. When you > put bigger tires on, the speedometer still reads how fast the driveshaft > is > turning, but since the bigger tires take you farther per revolution due to > the larger circumference, you are actually going faster than what the > speedo > reads. Hope this helps. > highrider71 > > I have always thought that oversize (in diameter) tires cause your > > speedometer to read _less_ than your actual speed. Is this not so? If > > not – why not? > > Jon Larsson > > > Bert, > > > I have the stocker aluminum alloy wheels and put 285/75/16 bfg ATs on > > > it. I found that the power difference is so small that it wasn’t even > > > in the equation. I have no trouble getting off the line and the extra > > > width actually seems to plant the tires better so there is less > > > spinning. The speedo is a little off, but not too bad. It’s about > > > 4mph at 75mph from what I can tell and of course, the indicated speed > > > is faster than the actual speed so that may save me some $$ on > > > tickets. I have no trouble with rubbing except, when in reverse with > > > the wheels turned hard right or left. The bottom of the inner fender > > > well catches on the corner of the tread and makes a horrific noise. I > > > trimmed 1.5" tall and about 5" wide off of the bottom of the inner > > > fenderwell and do not have any trouble. Can’t even tell it’s trimmed > > > when the truck is at "normal" resting position. Seems like if you get > > > the rubber, then you can just mark the fenderwells if they rub and > > > trim a little off. Maybe mine sits lower too (25k Miles) and you may > > > not have any rubbing at all. Definitely get the rubber though since > > > the stockers look too small.
Response:
Yes, that’s what I thought. So why did "derek" say that oversize tires showed MORE on the speedometer than actual speed, thereby saving (he thinks) him on some speeding tickets? Derek? Jon Larsson
– Hide quoted text — Show quoted text -> That is absolutely correct, Jonathan. I will try to explain best I can. > Your speedometer measures the speed (RPM’s) of the driveshaft, basically, > and is calibrated for your correct rear-end gears and tire size. When you > put bigger tires on, the speedometer still reads how fast the driveshaft is > turning, but since the bigger tires take you farther per revolution due to > the larger circumference, you are actually going faster than what the speedo > reads. Hope this helps. > highrider71 > I have always thought that oversize (in diameter) tires cause your > speedometer to read _less_ than your actual speed. Is this not so? If > not – why not? > Jon Larsson > > Bert, > > I have the stocker aluminum alloy wheels and put 285/75/16 bfg ATs on > > it. I found that the power difference is so small that it wasn’t even > > in the equation. I have no trouble getting off the line and the extra > > width actually seems to plant the tires better so there is less > > spinning. The speedo is a little off, but not too bad. It’s about > > 4mph at 75mph from what I can tell and of course, the indicated speed > > is faster than the actual speed so that may save me some $$ on > > tickets. I have no trouble with rubbing except, when in reverse with > > the wheels turned hard right or left. The bottom of the inner fender > > well catches on the corner of the tread and makes a horrific noise. I > > trimmed 1.5" tall and about 5" wide off of the bottom of the inner > > fenderwell and do not have any trouble. Can’t even tell it’s trimmed > > when the truck is at "normal" resting position. Seems like if you get > > the rubber, then you can just mark the fenderwells if they rub and > > trim a little off. Maybe mine sits lower too (25k Miles) and you may > > not have any rubbing at all. Definitely get the rubber though since > > the stockers look too small.
Response:
WOW!! I have A 2000 silverado 2500 4X4 ext cab short box and everyone keeps telling that 285/75/16 will easily rub but you say different. They also are telling me that my stock wheels are to narrow at only 6.5 inches wide. Again you say different. Please keep us updated. Did you notice any power loss when you went with the bigger tires? I am getting ready to buy new tires soon and until this post I was going to go with yoko geolander 265/75/16 but now have hope that I can go a little bigger. Again please let us know of any rubbing or problems that you may encounter. thanks Big Bert
– Hide quoted text — Show quoted text -> I have 285/75/16 BFG AT’s on the stock alloy wheels on my 2000 z71 > x-cab.no problems at all with rubbing, though i haven’t been into any > really rough stuff since putting them on. I don’t feel that the > wheels are too narrow. I run them at about 35PSI and they are fine. >does anyone know what the largest tire you can put on a 2000 Z71 extented >cab. Stock truck not lifted
Response:
> telling that 285/75/16 will easily rub but you say different. They also are > telling me that my stock wheels are to narrow at only 6.5 inches wide. Again > you say different. Please keep us updated. Did you notice any power loss > when you went with the bigger tires? I am getting ready to buy new tires > soon and until this post I was going to go with yoko geolander 265/75/16 but > now have hope that I can go a little bigger. Again please let us know of any > rubbing or problems that you may encounter. > thanks Big Bert
Bert, I have the stocker aluminum alloy wheels and put 285/75/16 bfg ATs on it. I found that the power difference is so small that it wasn’t even in the equation. I have no trouble getting off the line and the extra width actually seems to plant the tires better so there is less spinning. The speedo is a little off, but not too bad. It’s about 4mph at 75mph from what I can tell and of course, the indicated speed is faster than the actual speed so that may save me some $$ on tickets. I have no trouble with rubbing except, when in reverse with the wheels turned hard right or left. The bottom of the inner fender well catches on the corner of the tread and makes a horrific noise. I trimmed 1.5" tall and about 5" wide off of the bottom of the inner fenderwell and do not have any trouble. Can’t even tell it’s trimmed when the truck is at "normal" resting position. Seems like if you get the rubber, then you can just mark the fenderwells if they rub and trim a little off. Maybe mine sits lower too (25k Miles) and you may not have any rubbing at all. Definitely get the rubber though since the stockers look too small.
Response:
That is absolutely correct, Jonathan. I will try to explain best I can. Your speedometer measures the speed (RPM’s) of the driveshaft, basically, and is calibrated for your correct rear-end gears and tire size. When you put bigger tires on, the speedometer still reads how fast the driveshaft is turning, but since the bigger tires take you farther per revolution due to the larger circumference, you are actually going faster than what the speedo reads. Hope this helps. highrider71 – Hide quoted text — Show quoted text -> I have always thought that oversize (in diameter) tires cause your > speedometer to read _less_ than your actual speed. Is this not so? If > not – why not? > Jon Larsson > Bert, > I have the stocker aluminum alloy wheels and put 285/75/16 bfg ATs on > it. I found that the power difference is so small that it wasn’t even > in the equation. I have no trouble getting off the line and the extra > width actually seems to plant the tires better so there is less > spinning. The speedo is a little off, but not too bad. It’s about > 4mph at 75mph from what I can tell and of course, the indicated speed > is faster than the actual speed so that may save me some $$ on > tickets. I have no trouble with rubbing except, when in reverse with > the wheels turned hard right or left. The bottom of the inner fender > well catches on the corner of the tread and makes a horrific noise. I > trimmed 1.5" tall and about 5" wide off of the bottom of the inner > fenderwell and do not have any trouble. Can’t even tell it’s trimmed > when the truck is at "normal" resting position. Seems like if you get > the rubber, then you can just mark the fenderwells if they rub and > trim a little off. Maybe mine sits lower too (25k Miles) and you may > not have any rubbing at all. Definitely get the rubber though since > the stockers look too small.
Response:
I have always thought that oversize (in diameter) tires cause your speedometer to read _less_ than your actual speed. Is this not so? If not – why not? Jon Larsson
– Hide quoted text — Show quoted text -> Bert, > I have the stocker aluminum alloy wheels and put 285/75/16 bfg ATs on > it. I found that the power difference is so small that it wasn’t even > in the equation. I have no trouble getting off the line and the extra > width actually seems to plant the tires better so there is less > spinning. The speedo is a little off, but not too bad. It’s about > 4mph at 75mph from what I can tell and of course, the indicated speed > is faster than the actual speed so that may save me some $$ on > tickets. I have no trouble with rubbing except, when in reverse with > the wheels turned hard right or left. The bottom of the inner fender > well catches on the corner of the tread and makes a horrific noise. I > trimmed 1.5" tall and about 5" wide off of the bottom of the inner > fenderwell and do not have any trouble. Can’t even tell it’s trimmed > when the truck is at "normal" resting position. Seems like if you get > the rubber, then you can just mark the fenderwells if they rub and > trim a little off. Maybe mine sits lower too (25k Miles) and you may > not have any rubbing at all. Definitely get the rubber though since > the stockers look too small.
Response:
I have the 2000 z71 LS with 285/75/r16 BFGs A/T. They look decent, but there was some inner fender trimming to be done in the front of the wheel so they didn’t rub when turned all the way in reverse. Was a pretty simple fix, but to avoid cutting things, the smaller tires will probably work better. There is a pic on my site somewhere if your interested. www.woopies.net -> sorry, it needs a "lot" of work.
Response:
I have 285/75/16 BFG AT’s on the stock alloy wheels on my 2000 z71 x-cab.no problems at all with rubbing, though i haven’t been into any really rough stuff since putting them on. I don’t feel that the wheels are too narrow. I run them at about 35PSI and they are fine. – Hide quoted text — Show quoted text – >does anyone know what the largest tire you can put on a 2000 Z71 extented >cab. Stock truck not lifted
Response:
on the stock rims [16"x7"] you can get a 33" under the fenders with very little work. if you tighten the torsion bars up a bit, and tie back the inner fenderwell [rubber thingie] you should be ok. people like to run the 285/75/16’s on the stock rims, but the rim will be a 1/2" too narrow for the tire. if you ran a 255/85/16 or 265/85/16 they run in at the same height, but just a bit narrower, and will work nicely with the 16×7 rim — nick leinonen markham, ontario, canada http://www.picturetrail.com/nickleinonen .
does anyone know what the largest tire you can put on a 2000 Z71 extented cab. Stock truck not lifted
Response:
does anyone know what the largest tire you can put on a 2000 Z71 extented cab. Stock truck not lifted
