[LewisP]

FYI I sent an inquiry to PMC Tire with the above screen grab.

@LewisP, your initial order was a Fast wheel, but not the Mazda-approved one?

Well I had to change my order before it was shipped from PMC and thankfully the order was not fulfilled so I was able to change it. I had 19inch Fast Wheels Impression wheels at first but ended up with the only suitable 19inch wheels from PMC which were RWC MHK369 (925kg load rating). I would suggest you reach out to either Mazda Canada or your dealership to check with them if the safety notice is still valid. Again I've seen numerous owners going with different wheels than the recommended M016 wheels from Mazda (Mazda M016 Alloy Wheel (Metallic Black) — 18", 19", 21") and I'm sure they would be fine. Obviously if anything was to happen with the wheels, damaging the vehicle, I'm sure Mazda would point to lower rated wheels and not honor the warranty if that safety notice is real. Therefore I suggest you check with Mazda and have them confirm the information. I'm no expert here and I'm only going by what forum members have told me. I just didn't want to take any chance and went overkill.

 

[Blueprint]

Here's a view of the front wheel assembly from the back. A CX-90 PHEV was up on a lift for training purposes while I stopped by.

Well I had to change my order before it was shipped from PMC and thankfully the order was not fulfilled so I was able to change it. I had 19inch Fast Wheels Impression wheels at first but ended up with the only suitable 19inch wheels from PMC which were RWC MHK369 (925kg load rating). I would suggest you reach out to either Mazda Canada or your dealership to check with them if the safety notice is still valid. Again I've seen numerous owners going with different wheels than the recommended M016 wheels from Mazda (Mazda M016 Alloy Wheel (Metallic Black) — 18", 19", 21") and I'm sure they would be fine. Obviously if anything was to happen with the wheels, damaging the vehicle, I'm sure Mazda would point to lower rated wheels and not honor the warranty if that safety notice is real. Therefore I suggest you check with Mazda and have them confirm the information. I'm no expert here and I'm only going by what forum members have told me. I just didn't want to take any chance and went overkill.

As an automotive journalist, I have a more direct link to Mazda and just submitted them the screen grab and asked for an update on the safety specs. Also asked about using my PMC-supplied wheels.

 

[LewisP]

Here's a view of the front wheel assembly from the back. A CX-90 PHEV was up on a lift for training purposes while I stopped by.

As an automotive journalist, I have a more direct link to Mazda and just submitted them the screen grab and asked for an update on the safety specs. Also asked about using my PMC-supplied wheels.

Do you mind keeping us posted as I would love to have this information confirmed myself by the official source. I still have time to change my wheel order as the RWC wheels were back ordered until end of September. Thanks and sorry if I got you worried unnecessarily.

 

[narith]

I asked PMCtire about MHK369 - Black - 18" x 8" since it load rating of 1820lbs is lower then the recommended 1984.16lb. here's their response. I was asking for a PHEV GT.

Indeed, the MHK369 is one of the rare models that is recommended for the CX-90 considering its gross weight.

The wheels is recommended as a perfect fit for the CX-90 by RWC directly, meaning the wheel passes all requirements (clearance, load capacity, OE lug nuts, etc.).

it seem that manufacturer know some info on the load that we dont? i would liketo go for the 19 inc too, since it exceed the 900Kg, but not available at the moment

 

[Blueprint]

Do you mind keeping us posted as I would love to have this information confirmed myself by the official source. I still have time to change my wheel order as the RWC wheels were back ordered until end of September. Thanks and sorry if I got you worried unnecessarily.

Will do, and no worries - I'm an engineer, losing sleep over details like this is in my genes!

 

[Blueprint]

News from PMC. One of the owners called me. He checked the matter first with a Fastco engineer as they are an oem supplier. Fastco indicates in their response that typically the industry went for GVWR divided by 4, while oem's will spec GAWR. In the CX-90 PHEV's case, the GVWR is 6854 lbs and the highest GAWR is at the rear with 4090 lbs. That's 2045 lbs/wheel in the back and nobody, not even the accessory wheels made by Fastco will reach that. Since I will never tow, GAWR is probably overkill but GVWR is not with a 7-passenger. PMC feels the DTD wheel is safe at 1518 lbs. However, GVWR/4 = 1714 lbs. So PMC will replace a cracked wheel or will replace everything if I'm not at peace. The DTD wheel is at the limit with 782 lbs of cargo, passengers and fuel on board, not including cornering loads - I will probably swap, but I'm waiting for Mazda's input. The Fast "Switch" was what I wanted initially ... and it's rated at nearly 1800 lbs. Bonus: same grey as the oem alloys. Stay tuned!

 

[LewisP]

News from PMC. One of the owners called me. He checked the matter first with a Fastco engineer as they are an oem supplier. Fastco indicates in their response that typically the industry went for GVWR divided by 4, while oem's will spec GAWR. In the CX-90 PHEV's case, the GVWR is 6854 lbs and the highest GAWR is at the rear with 4090 lbs. That's 2045 lbs/wheel in the back and nobody, not even the accessory wheels made by Fastco will reach that. Since I will never tow, GAWR is probably overkill but GVWR is not with a 7-passenger. PMC feels the DTD wheel is safe at 1518 lbs. However, GVWR/4 = 1714 lbs. So PMC will replace a cracked wheel or will replace everything if I'm not at peace. The DTD wheel is at the limit with 782 lbs of cargo, passengers and fuel on board, not including cornering loads - I will probably swap, but I'm waiting for Mazda's input. The Fast "Switch" was what I wanted initially ... and it's rated at nearly 1800 lbs. Bonus: same grey as the oem alloys. Stay tuned!

Thanks for the information, I'm really curious to hear Mazda's take on this but it seems to confirm that choosing the RWC wheels with the 925kg load rating was probably the safest option for my winter setup.

 

[PhEVuser]

If you can get it, would you post the weights of your OEM wheel/tire and winter wheel/tire?

Thanks

 

[LewisP]

If you can get it, would you post the weights of your OEM wheel/tire and winter wheel/tire?

Thanks

They are suppose to arrive in the coming days so I'll weight the wheels with the tires mounted. The wheels where definitely not light so it's going to be a heavy setup.

 

[Blueprint]

And here is Mazda's tech dpt answer:
"The wheels this customer has installed are rated at only 75% of the required load requirements of the CX-90.

There is a risk the wheels would not stand up to impact load in the event of a collision, putting the occupants and other commuters at risk.

The only wheel options Mazda Canada can recommend are the factory supplied wheels and the Fastco M016 which was made available to order to our retailers in Q2 2023."

The Fast M016 is rated at 1984 lbs no matter the diameter and is indicated as "sold out" on Mazda's website. I inquired back to them about using GVWR/4 as I scrolled through all options and while there are a few in the 1797-1819 lbs range, nothing goes further.

 

[shahjahanlarik]

Whoa! Looks like I’m not going to find any set of wheels under 1000 CAD. Will have to resort to getting winter tires fitted onto the same rims. Not ideal, but I reallly don’t wanna end up spending over 1600 just for the wheels.

 

[LewisP]

And here is Mazda's tech dpt answer:
"The wheels this customer has installed are rated at only 75% of the required load requirements of the CX-90.

There is a risk the wheels would not stand up to impact load in the event of a collision, putting the occupants and other commuters at risk.

The only wheel options Mazda Canada can recommend are the factory supplied wheels and the Fastco M016 which was made available to order to our retailers in Q2 2023."

The Fast M016 is rated at 1984 lbs no matter the diameter and is indicated as "sold out" on Mazda's website. I inquired back to them about using GVWR/4 as I scrolled through all options and while there are a few in the 1797-1819 lbs range, nothing goes further.

Seems like Mazda is being very keen on the 900kg minimum load rating. For those that are looking at budget winter wheels, so far only the Braelin BR08 and the RWC MHK369 in 19inch will meet the minimum load rating requirement. Both are between 275 to 320 CAD per wheels which is still cheaper than the M016 from Mazda.

 

[Blueprint]

Seems like Mazda is being very keen on the 900kg minimum load rating. For those that are looking at budget winter wheels, so far only the Braelin BR08 and the RWC MHK369 in 19inch will meet the minimum load rating requirement. Both are between 275 to 320 CAD per wheels which is still cheaper than the M016 from Mazda.

@LewisP, the RWC MHK369 has a 1819 lbs rating in 18 inch diameter, so it won’t work.

 

[LewisP]

@LewisP, the RWC MHK369 has a 1819 lbs rating in 18 inch diameter, so it won’t work.

I was strictly speaking of the 19inch or above model. I didn't shop for 18inch so I'm unaware of any models beside the M016 that would be suitable.

 

[Blueprint]

@LewisP, the RWC MHK369 has a 1819 lbs rating in 18 inch diameter, so it won’t work.

… and the BR08 does not exist in 18 inch 😕. Waiting on news from Mazda and PMC, but it looks like the only 18 inch options are the oem wheels and the Fast M016, while moving up to 19 inch opens up the two options @LewisP brought up. I really wanted silver, grey or gunmetal wheels though. I will price out the 19 inch options to see if the aftermarket wheel prices balance out the extra cost of the tires.

 

[Blueprint]

Did some math. Going with PMC pricing, keeping the oem 19 inch size with the RWC MHK369 wheels and same pick of Toyo winter tires totals 2150 CDN. The BR08 is a gorgeous wheel but it adds up to 2400 CDN. Keeping my 18 inch « minus one » fitment with Toyos and the Mazda-supplied M016 is 2407 CDN, not counting mounting and balancing which would be extra here. Tires are 50-100 more from 18 to 19 but it is what it is to meet factory specs 😕

 

[Blueprint]

Further math: using 255/60r19 instead of the oem 265/55r19 reduces thread width, adds sidewall and is at 1.5% of the stock diameter. The Toyos are $45 less per tire too in that size, and are in stock, unlike the oem size. Pairing that with the RWC MHK369 should be a winning scenario. Will phone PMC over lunch.

 

[LewisP]

Further math: using 255/60r19 instead of the oem 265/55r19 reduces thread width, adds sidewall and is at 1.5% of the stock diameter. The Toyos are $45 less per tire too in that size, and are in stock, unlike the oem size. Pairing that with the RWC MHK369 should be a winning scenario. Will phone PMC over lunch.

I considered that option because of the lower price of the 255 size but although size wise they are quite similar to the stock size, they are techically a few mm bigger than the stock size and didn't want to have any potential for clearance issue.

 

[LewisP]

I just received my wheels with tires mounted from PMC. The setup is 19x8 RWC MHK369 with Toyo Observe Gsi-6 in 265/55R19 with rubber valves. Total weight per corner is 72.6 lbs which is quite heavy as not only are the wheels about 9 pounds per corner heavier than the M016, the Toyo tires are very heavy at 39lbs per tires. I'm not sure what the stock 21inch wheels/tires weight but I'll guess around 65lbs. At least I'm confident that the wheel can withstand normal use.

 

[narith]

I considered that option because of the lower price of the 255 size but although size wise they are quite similar to the stock size, they are techically a few mm

255/65/19 is within +1% difference in diameter compare to -.07%. so it shouldn't matter much in my opinion.

also I read that narrower tire are better in winter because same weigth are more concentrate in a smaller surface.