rotarenvy

quote " MS-01MAG - Forged one piece magnesium wheel 18X8JJ. Recommended tire size is 225X45R18. Wheel weight is 7.3kg. Wheel is not compatible with the RX-8 TPMS sensor. Center Caps and installation kit QMS1-MA-G0P also required"
mazdaspeed US

7.3kg is about the same as a forged aluminium volk in the same size and twice the price? why bother?

Spin9k

Except for no speed sensor that may not matter to you, the only other unfortunate thing is the LACK OF ANY responsibility taken by the manufacturer , i.e.,

"MAZDASPEED "Orange" Performance Accessories are sold "as is" without any warranty of any kind. All implied warranties, including all warranties of merchantability of fitness for a particular purpose, are excluded. Purchaser acknowledges that no representations have been made regarding these parts, including but not limited to any representations as to their quality of performance, and purchaser shall be responsible for and bear all costs of repair of replacement due to any defect in or failure of these parts or any damage to other components. Purchaser acknowledges that vehicles equipped with MAZDASPEED "Orange" Performance Accessories shall not be operated on public highways. MAZDASPEED "Orange" Performance Accessories are intended solely for the use on vehicles participating in race/off-road competition events. Purchaser acknowledges that all Mazda vehicle/parts/accessory warranties are voided if the vehicle is used in a competitive event. Purchaser also acknowledges that there will be no warranty coverage for any part or accessory that fails as a result of the installation of a MAZDASPEED "Orange" performance part. Purchaser accepts all responsibility for all vehicle modifications and all potential risks. MAZDASPEED "Orange" Performance Accessories have been designed and are intended for race/offroad applications only. Federal and many state laws prohibit the removal, modification of, or rendering inoperative any part or vehicle system affecting emissions or safety."

MrWigggles

Yes,

lightweight forged aluminum wheels make a lot more sense than true magnesium.

An SSR comp that is the same size will be as light or even a little lighter than the wheel you mentioned.

The only other advantage of the magnesium wheel you specified is that it might have a higher load rating than the SSR (or Volk), but since the RX-8 is a fairly light car, load rating shouldn't be an issue.

-Mr. Wigggles

rotarenvy

I always thought the problem with magnesium was cracking and short life span. so the highter load rating seems strange to me but a volk dealer told me similar.

it also shows you should take weights you find on the net with a grain of salt. most internet sites reckon these wheels are 6kg in weight. somewhat like people who claim volks are so light and think because a 15" volk weighs 4kg a 16" or 18" weighs the same urban myths.