burebistausa

2012 xB. manual trans. non dropped (and with no interest to drop)

I am interested on getting 225/50/18 on a non dropped xB 2nd gen. The idea is: #1 to get wheels that will close the gap with 1" (similar to what usually you get when drop and use regular diameter tires), #2 to get some increase on speed (this will give a speed increase of about +5 mph at 60mph), and #3 to flush the tires as much as possible.

Wondering if anyone tried using 225/50/18 and if anyone would have some pics on it. Any advise on what offset to use on front and on the back to bring the tires as flush as possible with no rubbing. Any rubbing concerns?

Also, anyone tried to calibrate the speedometer to correct the speed?

Greg S

iTrader: (1)

Offset would need to be about 35-40 in the front with the rear about 10mm more, so 25-30, to be flush. You'll most likely have to use spacers on the rear to even it out.

xseveredveganx

You may be able to recalibrate the speedo, but I haven't seen it.

I don't see how a larger tire will effectively increase your speed, but it will certainly alter your speedometer readings.
Larger tire will also raise rotating mass and potentially decrease fuel mileage. Ride will certainly improve, though!

vancouverray

The XB is really jack up in the back . Even with big rubber to fill the gap it will still look high in the rear . Had no plans on lowering mine , glad I did . Rides way better now .

pyroman131

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burebistausa

vancouverray, your rims are gorgeous. What are the sizes on your tires and on the rims? Please quote the offset if you know it.

pyroman131, your rims are great too. What is the size on your rims? 18X? Also, what offset they have?

xseveredveganx, by running larger diameter tires, you get higher speed at the same rpm. You are right, it will increase the gas mileage on accelerations, but I think at cruising speed it will decrease the gas mileage as the engine will run at a lower rpm. However, the mpg is not my highest concern. If there is anything that xB gen 2 with manual trans is crying for, it is the 6th gear.

vancouverray

Info on the specs 19x8.5 +38 offset concept one USA rims . 225/35/19 falkens . 10mm spacer in the rears . NF 210 springs , rides great however I'd like it a bit lower .

pyroman131

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pyroman131

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xseveredveganx

Meh. The info is here, people just have to look for it.