Wheel nuts

Submitted: Friday, Mar 06, 2015 at 11:06
ThreadID: 116953 Views:3624 Replies:5 FollowUps:7
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Hello, can anyone please help me. I have 200 series alloy wheels that I received from friend with no wheel nuts. They require a 21mm diameter shank nut. I have got 18.5mm shank nuts. Can I use them or do I need the bigger ones. I have been told 18.5mm nuts will be ok.
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Reply By: TomH - Friday, Mar 06, 2015 at 11:20

Friday, Mar 06, 2015 at 11:20
Most Toyota alloys have special factory nuts . I bought a set for a car and it cost me $8 each for the correct nuts. Was a few years ago but probably hasnt changed
AnswerID: 549504

Follow Up By: Jesse David C - Friday, Mar 06, 2015 at 13:33

Friday, Mar 06, 2015 at 13:33
Thanks Tom. If only they were still $8. Toyota quoted $19.45 each.
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Reply By: Member - Charlie M (SA) - Friday, Mar 06, 2015 at 14:48

Friday, Mar 06, 2015 at 14:48
Hi
The 200 series studs are 14x1.5mm maybe 1.75mm in thread pitch, most of the others are 12x1.5mm.
Most tyre shops should be able to get after market nuts to suit
Charlie
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Reply By: Rangiephil - Friday, Mar 06, 2015 at 17:01

Friday, Mar 06, 2015 at 17:01
While I am not a Toyota man, I had a look at the image on Google and the nuts use the same system as Land Rover with the wheel held on by a flat washer, but held radially by the diameter of the nuts being very close to the bore of the wheel.

While the wheel is centred by law by the hub size , if you use 18.5 MM nuts you risk the wheel moving 3.5 MM radially in relation to the hub . In this case the wheel could get loose from the movement and eventually fall off.

In low ratio the torque exerted on the wheels is enormous. So much so that earlier Toyotas often had problems with the bolts holding the hub to the axle shearing.
Buy the 22MM nuts.

Regards Philip A
AnswerID: 549525

Follow Up By: Rangiephil - Friday, Mar 06, 2015 at 17:04

Follow Up By: Rangiephil - Friday, Mar 06, 2015 at 17:08

Reply By: Member - Phil G (SA) - Friday, Mar 06, 2015 at 19:00

Friday, Mar 06, 2015 at 19:00
You must use the correct wheel nuts. I'm guessing the ones you already have are 12mm (as for 6 stud cruisers) and not 14mm (as for 5 stud).
Get a set of 20 on Ebay or at the wreckers.
AnswerID: 549533

Follow Up By: Jesse David C - Saturday, Mar 07, 2015 at 16:55

Saturday, Mar 07, 2015 at 16:55
The ones I have are 14mm. I have learnt there Re two diameters. 18.5 and 21mm. My wheels need 21mm
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Follow Up By: Member - Phil G (SA) - Saturday, Mar 07, 2015 at 19:34

Saturday, Mar 07, 2015 at 19:34
I thought all the Toyota 5 stud alloy nuts were the same - 21mm shank diameter as you say. Any idea what vehicle takes the 18.5mm shank? The genuine nut has a 22mm head on it.
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Follow Up By: Jesse David C - Sunday, Mar 08, 2015 at 00:25

Sunday, Mar 08, 2015 at 00:25
I have no idea what wheels the 18.5 fit. I am only just learning since getting my wheel set. The 18.5mm are $200 cheaper than the 21mm and so apparently alot of people are using them as substitutes. There was too much play in the wheel for my liking hence the research.
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Reply By: Ron N - Saturday, Mar 07, 2015 at 13:20

Saturday, Mar 07, 2015 at 13:20
Alloy wheels always require larger shank diameter wheelnuts as the alloy metal is softer than the steel used in the steel wheels.

This ensures the pressure on the nut seating area of the alloy wheel hub, from torqueing the wheelnuts, is spread over a larger area.

Thus, it's crucial to use the correct wheelnuts. You will suffer from irrepairable wheel damage and wheelnut loosening if you use smaller shank diameter wheelnuts, than the proper original factory wheelnuts.

Cheers, Ron.
AnswerID: 549550

Follow Up By: Jesse David C - Saturday, Mar 07, 2015 at 16:49

Saturday, Mar 07, 2015 at 16:49
Thanks Ron. I have ordered the genuine wheel nuts which are 21mm not 22mm as some have suggested.
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FollowupID: 834961

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