erf2u

I actually went to a 18x8.5 5x110 with a 34mm offset. See my post for pics.

https://www.chevyhhr.net/forums/show...2926#post12926

These were Foose Nitrous. Got a really great deal too.

I do not have any clearance problems whatsoever. At least I hope there will not be any performance or handling issues...

TXLeXTC

My understanding was going bigger (total circumfrance including tire) would jack with not only the spedo (which is livable) but also the tranny, being electronically programmed. The info I received (from a wheel shop) was that you wouldnt see any initial problems, but the stress you would be putting on the tranny would show up at about 30k.

If you *do* go bigger, make sure to retain your old wheels and tires, and put them back on EVERY time you take the car to the dealer for service, else warantee go bye bye!

If someone has solid insight into this, please share. My dang wheels are backoredred 6 mos, and have to pick new ones out.

FYI Konig makes a number of nice wheels that will fit.

erf2u

Does this also pertain to the manual trans (5-speed)??

TXLeXTC

I didnt ask, but I would think not, since you are controlling the shift points. There are other stress factors with going to a different size wheel, and the warranty issue still applies.

I would be more concerned with suspension issues than tranny issues in a stick. Coming from someone who drove lowered and/or custom wheeled cars for more than 10 years, I know the pains it can cause on your tires and suspension (the pains on the tires are usually a byproduct of the suspension issues.) The biggest thing to watch out for is camber changes when you change a wheel size (diameter or offset). But there is a whole multitude of issues you can run into with wheel changes regarding your suspension, esp on a FWD vehicle.

JoeR

If you lower it, you will have clearance issues in the rear!

Mine are 18 x 8 w/40 offset and also 235/40-18. The tire size is almost a perfect match for dia.

Springs are Gold-Line.

You will need to have the rear fenders rolled for clearance. Check out how far the lip goes inward and you'll see.

BIG JIM WOODMAN

CLEARANCE ISSUES MAY BE WITH THE OFFSET. MANY PEOPLE ARE LOWERING AND PUTTING 20s ON WITHOUT PROBLEMS. A CREDITABLE WHEEL SUPPLIER CAN HELP WITH THIS.

JoeR

With the stock offset being 42 mm, a 2 mm difference on mine is very small. The problem arises with the wider tread width on mine.

The OP stated a 35 mm offset. That puts any tire out 7 mm from stock.

Chevy didn't leave much room to play with on the HHR.

flyhhr

a 20x8.5 will fit with a 42'' off set will work you need a 245/30/20 and you will be fine just to let you know