DATSUNgeo Posted July 30, 2022 Report Share Posted July 30, 2022 After about a year, little by little the 620 is slowly coming together. I found the Nissan Titan wheels I’ve been looking for. I used a router to bore out the center and cleaned them all up. The router sure made a big mess of aluminum shavings all over! They sure look nice! I’m not too sure what tire size I will be using, any input is welcomed. Quote Link to comment
datzenmike Posted July 30, 2022 Report Share Posted July 30, 2022 What rim size? Nice.... I'm a sucker for spokes. Quote Link to comment
DATSUNgeo Posted July 30, 2022 Author Report Share Posted July 30, 2022 They are 17”x7.5”. It took me a while to find the right set. They were either too beat up, too pricey, being sold with off-road tires, missing the center caps, or all the above. I paid $250 for the 4 on OfferUp. I plan on lowering the truck either 2” or 3”. I would like either a lower profile tire(50, 55, or 60) but not sure what size to get?? Quote Link to comment
datzenmike Posted July 30, 2022 Report Share Posted July 30, 2022 The stock 620 tire was a 6:00X14 which is a 26" diameter tire today. Keep the new tires the same diameter and your speedometer will remain accurate and the the performance won't be killed by having something too tall. 225/50R17 are 8.86" wide and 25.86" diameter 235/50R17 are 9.25" wide and 26.25" diameter The wider the front tires the harder it is to turn to park. My 620 had 12.5 X 33s and had to design a power steering for it. What I have done in the past is get two slightly narrower tires (same diameter) for the front. The narrower fronts fool the eye into seeing the rears as much larger than the are. It's an old trick from the Muscle Car era. Quote Link to comment
DATSUNgeo Posted July 31, 2022 Author Report Share Posted July 31, 2022 Cool, thanks for the insight. I would go with the thinner tire, 225/50R17. With this size being close to the original diameter do you think I’ll have rubbing issues on a full radius turn? Thanks! Quote Link to comment
datzenmike Posted July 31, 2022 Report Share Posted July 31, 2022 Well if the rim off sets are the same just look at the tire clearance now and add 1/2 the total increase. If your current tire is 6" and you go to 10" then just imagine the tire being 2" wider on the frame side. You also mentioned lowering so there's that also. If the tire choice extends outside the fender lip facing straight ahead it's only a matter of time before you hit something and the body comes down on the tire. Everything affects everything else. Quote Link to comment
DATSUNgeo Posted July 31, 2022 Author Report Share Posted July 31, 2022 Got it. Hopefully these wheels end up tucked inside the fenders so when I do hit pot holes they don’t rub with up and down movement. Quote Link to comment
datzenmike Posted July 31, 2022 Report Share Posted July 31, 2022 This is why you have to do your homework. All the time I see people get a hard on for a set of rims... and they end up altering the car to make them fit where they will not. This is like cutting your ears off to get your hat on. Altering the vehicle is mutilation in my books. Nothing impresses me like a well sorted out set of rims and tires. There are aps on line where you can enter a few measurements and specs of your current tire and rim. Then enter the rims and tires you would like and see if it will work. Be prepared for disappointments but better than finding out too late. Quote Link to comment
thisismatt Posted July 31, 2022 Report Share Posted July 31, 2022 Lots of people have run these, so it can't be too hard Quote Link to comment
datzenmike Posted July 31, 2022 Report Share Posted July 31, 2022 Agreed. Over wide tires may be a problem. Quote Link to comment
DATSUNgeo Posted August 1, 2022 Author Report Share Posted August 1, 2022 22 hours ago, datzenmike said: Agreed. Over wide tires may be a problem. Thanks guys for the input. One of your tire size recommendations was 225/50R17, what if I went with a 215? The 215 is a bit more narrow than a 225, right? Thanks. Quote Link to comment
thisismatt Posted August 1, 2022 Report Share Posted August 1, 2022 Yes, that's the tread width in millimeters. /50 is the sidewall ratio to tread width. If you go with a narrower tread, then you may have to go with a taller sidewall ratio to keep the overall diameter the same, but there are only so many ratios so it's never perfect. 225/50R17 = 225 * .50 * 2 sidewalls / 25.4mm per inch + 17" rim = 25.86" 215/50R17 = 25.469", or about 2% different. 215/55R17 = 26.315", so a bit taller... 205/55R17 = 25.878"...pretty close to the 225/50 Quote Link to comment
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