Spare tire and rim of some sort I had my first flat..

I've made some "improvements" for holding up the back half of the spare, although in retrospect I think the net result was just adding another kg of weight. Oddly the floor already had holes in the gusset (under the sound damping material) that matched those in the bracket so I only had to drill through the very-thin base sheetmetal, removing the underside splash guard first.
I bought the TopmaQ scissor jack that @hieronymous recommended and used some old rear floor mats to keep everything quiet.

While underneath I noticed that Hyundai could have easily made the cavity large enough for a spacesaver by extending it both forward and rearward into the bumper space. There's lots of room that disappointingly has not been exploited.

 

You've scored the ideal size as well!

 

Hello all,

I got a few questions.

I recently purchased a spare tire on ebay. It is from a 2013 Genesis (T135 90 D17).

The weird thing is that the spare is slightly larger than my regular tire (215 55 R17). I would thought that it should be the same size since many of you purchased a similar sized tire. From your pictures, it seems that some of you have the same T135 90 D17 tire but it looks smaller than the regular tire????

Will the tire I bought work, even though it is like 1/2 larger than the regular Kona EV tire?

 

A 215 55 R17 has a sidewall height of 215 x 55% (118.25 mm). A 135 90 17 has a sidewall height of 135 x 90% (121.5 mm). Sidewall difference is only 3.25 mm or .128 inches. ( about a 1/4 inch for the entire tire height difference than the stock tire). Depending on which website you look at (and depending on the tire make) a 135 90 17 travels 759 revolutions per mile while a 215 55 17 travels 764 revolutions per mile. This is about as close you can get for a spare tire for the Kona EV.

 

By the way the Kona EV sold in India comes with a 135 80 17 spare tire. (See 2nd to last page of the attached brochure) The sidewall height of that tire is 108mm (135 x 80%). A sidewall difference of 10.25mm from the stock 215 55 17.

 

They seem to have used the 64 kWh range for this model with the 39 kWh battery.

 

Co-incidentally, I had mine yesterday. A big Tek screw very close to the shoulder, but in the tread area. Phew. (In Aus, if it's in the shoulder tyre shops are not allowed to repair it and the tyre is a write-off - though plenty of DIYers and 4WDers ignore that.)

Anyway, I was thankful for the temporary spare that I bought back in Sept 2021. (Post #71)

 

Does a T155 70 D 17 also work?

 

There is just enough room with my 135 90 17 to get the trunk floor lid to lay flat. I would say I have about a quarter inch to spare for tire width. A 155 70 17 would be 20mm wider (about 0.8 of an inch) and I don't think there would be enough room.

 

I'm using a T155/90 D16 and although I can squeeze it in, I had to let some of the air out to make it fit. I wouldn't recommend it if you have better options.

 

My T155/80 R17 allows the floor to lie flat.

 

Just another question.

I purchased a 21 mm socket for the lugnuts. My Kona EV is in the US, not Canada.

Although the socket fits into the lugnuts, it is not tight fitting....is that normal?

Is the 21 mm socket the closest to fitting the US Kona EV lugnuts, or is there a better size?

 

Yes, a 21mm is a loose fit. If your socket is a single hex you can use it but it is not ideal. OK maybe for infrequent DIY. A much better solution for lug nuts is a properly fitting single hex socket.

If your 21mm socket is a double hex then definitely do not use it, you will ruin the lug nuts.

The imperial equivalent is 13/16 inch which is slightly smaller (0.22mm) than 21mm. Buy single hex sockets for lug nuts - over time double hex sockets damage the chrome at the points of the nuts.

FWIW Australia is a metricated country yet my Aussie Kona seems to need the imperial size. I wonder if it's the same in Canada and other metric markets.

 

I just wanted to thank everyone for the information on which spare tires will work. I have a 2020 Ultimate model (in the USA) and removed the foam blocks from the rear storage area. Visited a local wrecking yard and found a 135/90/17 spare tire from a Genesis. I paid $17.50 out the door. My granny charger came in a long horizontal canvas bag. I added the lug wrench and other items from the foam blocks to the canvas bag. I placed a scissor jack under the spare tire on the front side and the canvas bag on the rear side which seems to hold the spare fairly level. I was able to strap down the tire using one of the rear seat mounts and removing a plug from the rear area of the floor on the driver's side. Not perfect, but should hold well enough. I live in North Central California so it doesn't rain enough here to worry about any water intrusion. Thanks again for the great information.