OEM spare tire install

I ordered from the part numbers Hammer provided and they were spot on.
Go with his numbers.

 

Thanks. That’s what I plan on doing. I just needed assurance that Toyota hadn’t suddenly changed something. I appreciate the feedback.

 

Your posts about all of this have been very helpful, so thanks again. So, I just received my toyota spare 16" "disk" rim (part no. 42611-21280). I gotta say, it is not the lightest thing in the world, but I digress.

I have a prime SE with the stock 17" wheels. Anyone know if, due to the prime's higher curb weight, if the disc brake calipers and/or rotors on the front wheels of the prime are any bigger than the prius hybrid's? If yes, has anyone test fitted the 16" steel disk rim on a prime (of any trim) to be sure it clears the front calipers (or front rotors) ?

And, regarding the spare tire for this set up (T145 / 90D16), what do the "T" and the "D" signify in the the tire size? I found Kumho and Yokohama spare tires in this size for pretty cheap; if the price is similar, any advantage/disadvantage of one brand over the other?

 

I can’t confirm your question regarding fitment on the SE, but with regard to the tire coding, “T” indicates a temporary spare, while I believe “D” before the 16 denotes wheel diameter (in this case, 16”). And you also may see 106M in the tire description - “106” is the tire load index (equates to approx 2,000 lbs), and “M” is the tire’s speed rating (81 mph, although most manufacturers will recommend that you not exceed 50 mph when using a compact spare).

As for Yokohama vs. Kumho, I venture to guess they are roughly equivalent. It’s not like these are performance tires; just intended for short distances in emergencies. I ended up getting a Yokohama for myself simply because I figured a Japanese tire is more appropriate in a Japanese car

 

Thanks for the input. But, l am curious, have you tested the fitment of the 16" toyota steel spare rim on the front of your own hybrid prius? No clearance issues with your front rotor or caliper? What trim do you have?

No problems with using the original lug nuts (designed for aluminum rims) on the steel spare wheel? They work fine with the thinner steel rim?

Also, where can l find the official torque numbers for tightening the lug nuts after a tire rotation?

Thanks.

 

The lug nuts work fine with either the alloy rims or the spare; torque spec is 76 ft/lb. Info is in your Owners Manual (excerpt attached).

 

Thanks for that. But, unfortunately, it is not in my prime owners manual. That section is just directions on how to use the fix-a-flat kit! (since the prime comes with no spare, no jack, and no tools--except tow hook)

 

Ah. Yeah you can download pdf manuals from Toyota Tech Info site (just Google). They’re easier to search too, then the paper tome.

Assuming the lug nuts are sim to previous gens, they have a captured washer to clamp the alloy rims, and a small but sufficient taper at the end, for the temp spare.

just think about it too: it’d be a major gaffe for Toyota, if the their lug nuts an temp spare rims were incompatible.

 

@Hammersmith, thank you for that correction of my post. I had forgotten that detail and made an assumption — and I know better. Apologies for the misinformation!

 

Good idea, I downloaded some of those pdfs.

Any idea what the lug nut size is for the gen5 prius? 21mm?

 

That's likely. Previous gen's are 21 mm, and 21 mm is what our son's Mazda CX5 is as well, and that's a heavier weight class I think.

Assuming you're socket shopping. If you've got a caliper (measuring tool) you could check. Or even some sort of drawing compass, then lay it on a ruler.

 

Yes, I could do that as I do indeed have calipers. But the car is outside in some damn cold temps. And I have to first remove the aero cover (which is plastic) to access the lug nuts. But I will certainly do that when the temp increases such that the plastic is a bit less brittle. And it should get warmer this coming week. But thanks for the input.