20” wheels

[fredf]

Does anyone know if 20” rims would clear the brakes on the Performance model for winter tires?

 

[Looney100]

Yes. On the Genesis website, you can order wheels down to 18” with your vehicle.

 

[EVman]

Yes. On the Genesis website, you can order wheels down to 18” with your vehicle.

Have people got suggestions for suitable winter rims and tire packages ?

 

[Looney100]

Wheels are often a very personal decision.
I’m watching a few different places to see if something suitable goes on sale before the winter. I’m looking for 18” wheels to minimize cost and maximize range, and will be putting Michelin X-Ice tires on them.

 

[fredf]

Wheels are often a very personal decision.
I’m watching a few different places to see if something suitable goes on sale before the winter. I’m looking for 18” wheels to minimize cost and maximize range, and will be putting Michelin X-Ice tires on them.

Don’t electric vehicles (due to weight) put extra demand on tires so that not all tires are suitable?
For instance I like the Blizzaks but don’t know if they are suitable for this car

Anyone know?

 

[Looney100]

Don’t electric vehicles (due to weight) put extra demand on tires so that not all tires are suitable?
For instance I like the Blizzaks but don’t know if they are suitable for this car

Anyone know?

You need to look at the specific load index of each tire. You can't make any general conclusions by tire type. The load index of a specific tire will generally vary by size. Manufacturers often produce extra load (XL) versions, which can support heavier vehicles with the same sized tire.

For example, let's assume that a 225/50/19 Blizzak has a 95 load index. A225/50/19 XL version of the same size may have a 100 load index at max pressure. A 225/55/19 size of the same (standard load) tire may have a 98 load index, just because of the different dimensions.

In short, understand what the tire markings mean and what you wat/need for your vehicle, and buy accordingly.

 

[Looney100]

Here's my general thought process when looking for a winter wheel & tire set. For full disclosure, I consider tires to be one of the most important parts of the car, so am happy to pay for quality. As a result, I don't think that I've purchased anything that wasn't from a major tire brand in the last 20 years.
There are some that will insist on OE or forged wheels. I do not. If I were buying for a performance vehicle with very low profile tires I might consider it, but I don't think most of us would notice a difference with casual driving.

1. I'm less fussed about styling, so generally look for the smallest diameter wheel that will fit.
2. Once I've decided on a wheel diameter, I then look at online tire diameter calculators to see what sizes of tires will give me a similar overall circumference. The general rule is to keep things within 2% of the original, but I try to keep it as close as possible.
3. Check a few different places for reviews of tires to make sure I'm current on what's in the marketplace and how they perform. Make a decision on a tire, noting what wheel widths it is compatible with.
4. Find a wheel of the diameter and width determined above that looks decent. Make sure offset allows for proper clearance of brake & suspension hardware and wheel well. I much prefer hub-centric wheels, so unless significant other compromises would need to be made, will generally lean toward one that avoids the need for hub rings.

Some other things to keep in mind:

• A larger wheel & tire combo is generally heavier and more expensive. With EVs, that weight can make a noticeable difference in range. Smaller is better here, IMO.
• Less wheel and more tire generally results in a smoother ride. Runflats and XL tires are generally less comfortable and more noisy than standard ones.
• Look for a wheel that is 'winter rated'. Some finishes on alloy wheels don't withstand the elements well.
• Lately, there have been tires advertised as "all-weather". They are generally a bit of a compromise between all-season and winters. We're all getting a set suitable for the summer with the car. Go with a proper winter set if you're buying something.
• There tends to be some old-school thinking when it comes to tire sizes. The recommendation used to be that winter tires should be thinner to cut through the snow. That isn't so important with newer tires. More in the context of summer tires, wider tires don't provide more contact patch than thinner ones, nor any other traction benefit for normal driving. Tread design and compound are what's important. Wider tires are more prone to aquaplaning.

 

[fredf]

You need to look at the specific load index of each tire. You can't make any general conclusions by tire type. The load index of a specific tire will generally vary by size. Manufacturers often produce extra load (XL) versions, which can support heavier vehicles with the same sized tire.

For example, let's assume that a 225/50/19 Blizzak has a 95 load index. A225/50/19 XL version of the same size may have a 100 load index at max pressure. A 225/55/19 size of the same (standard load) tire may have a 98 load index, just because of the different dimensions.

In short, understand what the tire markings mean and what you wat/need for your vehicle, and buy accordingly.

Excellent. Thanks

 

[Rimsky44]

I'd also add, 255 is awfully wide for winter use. I understand the car has a lot of torque, but I'd personally go with 235-60-18 over 255-55-18 for winter use (or 235-55-19 over 255-50-19).

The narrower your tire, the less likely you'll float in the snow and more likely the tire can slice through the snow.

 

[fredf]

Does anyone know the offset for the wheels? and the hub bore?

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[fredf]

I'd also add, 255 is awfully wide for winter use. I understand the car has a lot of torque, but I'd personally go with 235-60-18 over 255-55-18 for winter use (or 235-55-19 over 255-50-19).

The narrower your tire, the less likely you'll float in the snow and more likely the tire can slice through the snow.

I know downsizing is the mantra. But don't EPS and traction control calculate based on factory shipped tires' contact patches? If you change the size of the contact patch (narrower, taller tires) would that not affect the technical wizardry? There is an opinion out there that suggests significant downsize can unsettle the handling for this reason. Hence from 21" (on the Performance) down past 19" might not be such a great idea.

 

[Rimsky44]

I know downsizing is the mantra. But don't EPS and traction control calculate based on factory shipped tires' contact patches? If you change the size of the contact patch (narrower, taller tires) would that not affect the technical wizardry? There is an opinion out there that suggests significant downsize can unsettle the handling for this reason. Hence from 21" (on the Performance) down past 19" might not be such a great idea.

All those sizes are within mm's of each other from a total diameter perspective. It's not going to impact your traction control. Going up or down in rim diameter means you need to change the tire sizing so overall diameter is same or similar.

Traction control measures how fast the wheel is spinning - if your overall diameter is too much bigger, it thinks your wheel is going slower than it actually is. If the diameter is too much smaller than OEM, it thinks you're going faster than what it should be. So long as your overall diameter is similar it won't make any difference.

FYI - 255-55-18 is 737.7mm diameter. 235-60-18 is 739.2mm. 255-40-21 is 737.4mm.
It's just calculated based on (255 x 0.55 x 2) + (18x25.4) for 255-55-18.

You may also want to check out Tire Rack on winter tire selection: https://www.tirerack.com/tires/tiretech/techpage.jsp?techid=126&

 

[fredf]

All those sizes are within mm's of each other from a total diameter perspective. It's not going to impact your traction control. Going up or down in rim diameter means you need to change the tire sizing so overall diameter is same or similar.

Traction control measures how fast the wheel is spinning - if your overall diameter is too much bigger, it thinks your wheel is going slower than it actually is. If the diameter is too much smaller than OEM, it thinks you're going faster than what it should be. So long as your overall diameter is similar it won't make any difference.

FYI - 255-55-18 is 737.7mm diameter. 235-60-18 is 739.2mm. 255-40-21 is 737.4mm.
It's just calculated based on (255 x 0.55 x 2) + (18x25.4) for 255-55-18.

You may also want to check out Tire Rack on winter tire selection: https://www.tirerack.com/tires/tiretech/techpage.jsp?techid=126&

You should not downsize your winter tires - autoExpert.ca

You should not downsize your winter tires

www.autoexpert.ca

 

[Rimsky44]

You should not downsize your winter tires - autoExpert.ca

You should not downsize your winter tires

www.autoexpert.ca

You can go and follow that recommendation if you wish.

I will definitely not follow that recommendation, having used it on all my newer cars with all sorts of ESP/traction control. I have a lot more confidence in a site like Tirerack that actually tests these in a controlled environment than an unknown site.

How do the ESP determine your car slipping? All they can do is monitor the wheel speed, the rotational yaw, and steering angle. Wheel contact patch and coefficient of friction are not measured.

 

[Looney100]

The narrower your tire, the less likely you'll float in the snow and more likely the tire can slice through the snow.

This sounds a lot like the common misconception I referred to a couple posts ago.

While most sites seem to incorrectly make a similar comment, I found this from the Continental site interesting.

Wide tires

In our high-performance-tire segment, Continental offers wide tires for high-performance vehicles, medium and luxury-class cars, and SUVs.

www.continental-tires.com

I understand that a wider tire will have a greater ‘wavefront’ of snow to deal with, but aside from what I suspect is an imperceptible affect on economy, what’s the harm? I find Continental’s comment about more bite from siping more compelling.

 

[Looney100]

Does anyone know the offset for the wheels? and the hub bore?

Hub bore is generally consistent by manufacturer. Genesis seems to be 67.1mm. I haven’t seen anything on offset yet.

 

[Rimsky44]

This sounds a lot like the common misconception I referred to a couple posts ago.

I understand that a wider tire will have a greater ‘wavefront’ of snow to deal with, but aside from what I suspect is an imperceptible affect on economy, what’s the harm? I find Continental’s comment about more bite from siping more compelling.

I guess it depends what you want your snow tires to do. I'll quote the key points in your link:

1) "A wider tire equates to better performance on dry or wet roads and compacted snow."
2) "Also, the car will have less control on slippery, loose surfaces like gravel."

If you're on compacted snow and never deal with slippery surfaces like slush or fresh non-compacted snow, sure, go as wide as you want. I personally am not worried about the car's grip in dry, wet, or compacted snow. I care about when the surface is slippery and I need the snow tire to keep me on the road.

Nokian tires (Wide or narrow tires? Here’s how your choice will affect driving / Nokian Tyres) says the same thing you did.

"In the winter, narrow tires are better under extreme conditions as they provide higher surface pressure against the road. Narrow tires also work better than wider ones in loose snow and slush. Wider tires, for their part, will offer more grip on hard surfaces"

Do you want good traction in good conditions, or do you want good traction in bad conditions?

 

[Looney100]

I guess it depends what you want your snow tires to do. I'll quote the key points in your link:

1) "A wider tire equates to better performance on dry or wet roads and compacted snow."
2) "Also, the car will have less control on slippery, loose surfaces like gravel."

If you're on compacted snow and never deal with slippery surfaces like slush or fresh non-compacted snow, sure, go as wide as you want. I personally am not worried about the car's grip in dry, wet, or compacted snow. I care about when the surface is slippery and I need the snow tire to keep me on the road.

Nokian tires (Wide or narrow tires? Here’s how your choice will affect driving / Nokian Tyres) says the same thing you did.

"In the winter, narrow tires are better under extreme conditions as they provide higher surface pressure against the road. Narrow tires also work better than wider ones in loose snow and slush. Wider tires, for their part, will offer more grip on hard surfaces"

Do you want good traction in good conditions, or do you want good traction in bad conditions?

Good points. Here in Calgary, our side streets are not reliably cleared in the winter, so the snow quickly compacts and becomes a sheer ice-like surface - so I give a heavier weighting to ice traction vs. snow.

 

[fredf]

I know it's a bit early to be worried about this but I have called a couple places and Tire Rack said order soon because they expect a large price increase before winter and tires are currently in short supply
I'm getting the Performance model and will slightly downsize to 20". In that size, with XL load capacity, I have decided I'm looking at the Blizzak LM 005, the Michelin X-Ice and the Vredstein WintracPro. The X-ice are out of stock in most places!

I will also be buying 20" rims but I'm having trouble getting the offset from Genesis. If anyone knows the offset please let me know.

Just passing on the information.

 

[Looney100]

I know it's a bit early to be worried about this but I have called a couple places and Tire Rack said order soon because they expect a large price increase before winter and tires are currently in short supply
I'm getting the Performance model and will slightly downsize to 20". In that size, with XL load capacity, I have decided I'm looking at the Blizzak LM 005, the Michelin X-Ice and the Vredstein WintracPro. The X-ice are out of stock in most places!

I will also be buying 20" rims but I'm having trouble getting the offset from Genesis. If anyone knows the offset please let me know.

Just passing on the information.

I’ve found tire availability to be seasonal. Buying winters may be easier when it’s not June.