Lightest Stock Size Wheels

[Lelandjt]

I'm looking for the lightest wheels with the exact same width and offset as the stock 17s. Feel free to list 18s too for anyone looking for those. This doesn't seem like a difficult find but searching through old posts some wheels are no longer available and others are 8" wide or slightly different offset. Coming up empty searching retailers too. Am I being silly wanting exactly 48mm offset?

I just want bronze wheels that are lighter than stock but don't change the tire shape or suspension geometry.

[Jianlun]

Rpf1 17x7.5 et48 silver 6.93kg 3797758048SP
Rpf1 17x8 et45 gold 7.1kg (tyre rack), 7.3kg (oem brochure) 3797808045GG
Tc105x titan 17x7.5 et45 6.8kg
OZ Alleggerita HLT 17x7.5 et48 7kg W0182320176
BBS RF 17X7 et48 6.4kg
BBS RF 17X7.5 et48 6.6kg
Ce28n 17x7.5 et50 6kg
Ce28sl 17x7.5 et48 6.8(unconfirmed)kg
Ssr gtf01 17x7.5 et48 7kg (potentially discontinued?) Sgd630
Advan tc4 17x7.5 et45 7.5kg sgd537

stock is 7.5 et48 so i exercised some +/- hahaha.


your best bet is OZ Alleggerita, many colours avail in tire rack.

[Lelandjt]

I thought stock is 7" wide. It seems like offsets between 43-50mm are okay.

[dragoontwo]

Originally Posted by Lelandjt

I thought stock is 7" wide. It seems like offsets between 43-50mm are okay.

The 2nd gen cars are 7.5" stock. That being said, the Alleggerita in 17x8 are under 16 lbs.

[timurrrr]

Originally Posted by Lelandjt

I'm looking for the lightest wheels with the exact same width and offset as the stock 17s. [...] others are 7.5" wide or slightly different offset. [...] Am I being silly wanting exactly 48mm offset?

I just want bronze wheels that are lighter than stock but don't change the tire shape or suspension geometry.

Yes, changing the offset to a lower value won't hurt if you're only changing it slightly (et45? maybe even et40?). If anything, it will improve how the wheels fill the wheel arches.

As others have already pointed out, gen.2 stock wheels are 7.5" in width.
Won't hurt to consider 17x8 either. It will also be better for 225/45R17 tires when inevitably you change your tires from stock.

Also note that stock Primacy HP look narrower than many other tires in the same dimension.
225/45R17 SX2's will look less stretched on 17x8 than stock tires are on stock wheels.

[AndyRC]

Originally Posted by Lelandjt

I'm looking for the lightest wheels with the exact same width and offset as the stock 17s. Feel free to list 18s too for anyone looking for those. This doesn't seem like a difficult find but searching through old posts some wheels are no longer available and others are 7.5" wide or slightly different offset. Coming up empty searching retailers too. Am I being silly wanting exactly 48mm offset?

I just want bronze wheels that are lighter than stock but don't change the tire shape or suspension geometry.

How about these

https://www.toyota.com/content/dam/t..._Ebrochure.pdf

Slightly wider fitment by 5mm but Toyota are recommending it and only 17lbs , I’ve not seen a part number yet but look the same as the TRD ones sold for the GT86

[Lelandjt]

Thanks for the suggestions guys. It's weird that all my searches came up with 7.0" width for the 2nd Gen.

[daiheadjai]

For the price and the weight, it's pretty hard to beat RPF1s...

[timurrrr]

Originally Posted by daiheadjai

For the price and the weight, it's pretty hard to beat RPF1s...

Konig Hypergram?
It's cheaper right now, and might be stronger.
Haven't compared the weight though.

[Varelco]

You limit your options trying to keep the same offset. One of the lightest wheels available...

17x8 ET42 TWS T66-F 13.93 lb

These are labelled specifically for 86/BRZ fitment

https://www.tws-forged.com/tws_t66-f.html

[Lelandjt]

Originally Posted by Varelco

You limit your options trying to keep the same offset. One of the lightest wheels available...

17x8 ET42 TWS T66-F 13.93 lb

These are labelled specifically for 86/BRZ fitment

https://www.tws-forged.com/tws_t66-f.html

Yeah, I realize now it's okay to go down to 41ish offset, but I wouldn't go higher than 48. That's a very light suggestion!

[timurrrr]

May I ask why you need lightest wheels possible?

Are you ok to potentially sacrifice the strength of the wheel just trying to chase down the mythical "lightest wheel = fastest acceleration"?
Are you really going to feel the difference of a few % worth the risk of bending the wheel on every pothole?

[lostinmysenses]

Originally Posted by BlkTrax

https://enkei.com/shop/wheels/racing/rpf1/

Part# 3797758048 Finish - SP Size 17x7.5, ET+48 Bolt- 5x100 Bore -73 Weight (lbs)- 15.25

^^^ Fits your request for the Exact same Dimensions of the OEM wheel. Paint or Powder coat to color?

This is the Lightest Wheel for SCCA Solo Street Class I've been able to find ; that is widely available, and not a one off, or overpriced (less than $300) unobtanium.

I sent an email to APEX To see if they would make a Specific Auto-X Wheel, 17x7.5 +41 that's Hub-centric and hopefully lighter than the RPF1, They were looking into it, was the response.

OEM Wheel(s) 17x7.5, 18x7.5 +48
Ideal Street Class wheel - 17x7.5 +41 with 225/45-17 Tire

2022 Street Class Rules:
Any type wheel may be used provided it complies with the following:

A. It is the same width as standard and as installed it does not have an offset more than ±7.00 mm (±0.275”) from a standard wheel for the car.
The resultant change in track dimensions is allowed.

B. Wheel (rim) diameter may be increased or decreased 1” from the standard part. This change may be applied to the front, rear, or both axles.

What are the advantages of running a +41 offset vs +48? Does it have any effect on handling characteristics?

[timurrrr]

Originally Posted by lostinmysenses

What are the advantages of running a +41 offset vs +48? Does it have any effect on handling characteristics?

Slightly wider track => slightly less lateral weight transfer in corner => slightly more grip.
Also slightly compromised suspension geometry => slight negative impact on steering feedback.
Also arguably better esthetics.