What is critical is the diameter of the tire. Should be extremely close or exactly same diameter as the tires on the car. if you have all wheel drive, with wrong diameter, you can ruin the diffs. Make sure its a very short drive if you put that on. Google "Tire calculator" and input your tire sizes. Spare and your stock tire. You get measurements from it.

 

The stock tire size is 245/60-18. The outer diameter of the 165/80-17 stock spare tire is 7.4 percent smaller than stock (27.4" vs 29.6"). The 165/90-17 is 3.0 percent smaller than stock (28.7"). It should work fine on the car, with no problems.

A full-size wheel and tire is another alternative, and won't have limits on your speed or miles like a compact spare tire does. You can find full-size used stock wheels on car-part.com; it may come with a tire, but if it doesn't, you can find used tires here and here.

 

The stock tire size is 245/60-18. The outer diameter of the 165/80-17 stock spare tire is 7.4 percent smaller than stock (27.4" vs 29.6"). The 165/90-17 is 3.0 percent smaller than stock (28.7"). It should work fine on the car, with no problems.

A full-size wheel and tire is another alternative, and won't have limits on your speed or miles like a compact spare tire does. You can find full-size used stock wheels on car-part.com; it may come with a tire, but if it doesn't, you can find used tires here and here.

is the full size wheel will fit in spare tire compartment underneath the 2015 MDX?

 

FYI - you can find cheap spare tires in junkyards too

 

car-part.com (which I just mentioned above) is the website that all the big junkyards use to list their parts. So you can search it for a compact spare wheel/tire as well as for a full-size spare wheel/tire.

 

So I purchased p/n 06421-TZ5-A10 Spare Tire Kit from the Acura dealer for $81.42. This kit consists of the spare tire rim, valve stem, spare tire hoist, spare tire caution label, jack, wheel nut wrench/jack handle and tire and load information label. Note that it does NOT include the tire!

Finally, after many tries, Discount Tire found a Kuhmo tire in 165/90R17 for $95.00. The tire is slightly larger than the -80 Goodyear or Bridgestone but it fit nicely into the spare tire opening under the MDX.

Thank you for the information. Does the Kuhmo tire fit on the wheel included with the Acura Spare Tire Kit you purchased or did you have to purchase another wheel?

I appreciate the assistance.

 

The Kuhmo tire fit the steel wheel from Acura. It also fit into the spare tire well without a problem and is completely hidden.

 

Thank you. Ordered the Kuhmo tire this morning.

 

I am about to purchase the kit and I see the details above on the tire needed for the donut rim, but will the exact 2014 aluminum 19" rim fit into this kit / well? Please only reply if you know for sure.

 

Ok I got the kit with the jack, lift, etc and a steel rim with the kit. Im not sure of the size of the rim, but it is smaller than factory 19" aluminum rims. I went ahead and removed my factory rim/tire form the car to make sure it would fit and it does. It is a really tight fit, but it will work. This is for anyone, like myself that would prefer to have an original tire and rim in lue of the donut.

 

I did the same, we lease a 15 tech fwd BUT have a 11 month old and i couldnt see NOT having the spare.

To answer theabove question, the acura kit comes with a 17" donut

I ended up going with the
Oem acura kit on ebay
Kumho tire (little taller than recommended)
And local install on tire and hanger hub

All in for $200 vs $600 at dealer

You can put a full size under rear BUT that hangar isnt really designed (IMO) for prolonged weight like that.
Donut yes, 19" tech wheel and tire no.

Either way im happy AND if i did god forbid get a flat the cheaper taller tire would only be for a day of use ...if that


FYI the Ford Edge uses the same exact size OEM tire for spare as mdx
So if u did want to cheap out, check junkyards for a wrecked one or ebay and just toss the steelie out

 

You can put a full size under rear BUT that hangar isnt really designed (IMO) for prolonged weight like that.

Yes, it is. You're simply wrong about that.

 

This is a great thread and should be stickied/bookmarked.

 

You can put a full size under rear BUT that hangar isnt really designed (IMO) for prolonged weight like that.
Donut yes, 19" tech wheel and tire no.

The hangar was clearly designed to be able to sustain the weight of the regular rim/tire and the space was designed to fit one as well. The reason this is obvious is because that's where the owner's manual tells you to stow the flat when you replace it with the spare. Check out the owner's manual and you can confirm what I just stated.

 

I'm sure it can hold it, but does it state for everyday driving over years time?
If so my apologies, from looking at the kit in hand id be nervous with ny roads & piles of ice 'catching' the tire and extra tension put on that cable n rubber holder.

My .02

 

I'm sure it can hold it, but does it state for everyday driving over years time?

Of course it doesn't say that - it would be an awkward and unnecessary thing to state. They also don't state "for only 3 hours" or "for just a short time" or anything. It does state to stow the flat there and imply to go ahead and drive with it that way down the freeway. In order to do that it 'has' to be strong enough to support the tire.

I've had other SUVs with a similar spare tire location that were provided with full size spares from the factory. It has the same cable 'suspension' system as the MDX. These cables are quite strong. I've never had one break. I've used them while 4 wheeling and thus jarring it considerably with no problem. I have a 1998 Durango with > 225K miles on it that's had a full size spare held that way the entire time.

Bottom line - the owner's manual states the full size wheel can be stowed there and doesn't place any mileage or time limits on it and it has to be strong enough to not fail. You can always double-check with Acura though and see what they have to say - i.e. if they say 'not for more than 90 minutes' or something. A statement like 'not permanently' or 'a short time' would be meaningless.

 

I ordered the Acura spare tire kit for my 2015 MDX at dealer for $78.24 and found a Yokohama T165/80D17 for $90 + tax and shipping at TireRack.com. I'll take it to tire installer and then install the kit myself. Any special tools needed to DIY this install?

 

We bought the spare tire kit from Tim at OEM Acura Parts. EXCELLENT to work with. Then bought the Goodyear spare from Tire Rack. It cost $17 to have the tire put on the rim. The hubby had all the tools he needed in the spare tire kit and installed the spare in less than 10 minutes. Good luck.

Stacy

 

My '15 awd w/tech came with a spare tire (underneath) versus in the trunk.

 

Anyone with a spare stores it underneath.

 

I bought all of the major pieces in the spare tire kit other than the rim shortly after buying a new 2014 MDX (FWD base model) in December 2013. I decided to postpone installing the kit until I replaced the four OEM tires on my MDX so I could use the best of those tires as the spare. The four OEM tires have less than half of the original tread left after 32K miles; I live in Houston where it rains hard so I replace tires while they are still barely rain worthy. I recently purchased four replacement tires (Pirelli Scorpion Verde All Season Plus in OE size) and an extra wheel compatible with the OE 245/60R18 tires: an 18x8, 5 x 114.3 wheel from a 2014 Mustang GT on eBay for $75 including shipping. Today I installed the spare tire kit which included two surprises, one of which was quite troublesome.

First, the spare tire hoist does not include the five 8M x 20 "bolt-washers" (part #93401-08020-05) required to attach it to the underside of the car. These flanged bolts are included in the spare tire kit (including the space saver rim) but not with the hoist purchased separately. I contacted the nearest Honda and nearest Acura dealer via email to get a price quote (and determine if the parts were in stock); neither dealer maintains an online parts inventory and neither responded quickly to my inquiry. So I went to a nearby Home Depot (much closer than the dealers) which I knew had bolts in stock that would work if I supplemented them with washers. I was pleasantly surprised to discover that the store stocks flanged bolts equivalent to the OE parts for a significantly lower price; these parts did not appear online when I searched the Home Depot web site. Perhaps I failed to specify the magic keywords but they may not be in the online Home Depot catalog.

Second, the center hole in the Mustang GT wheel is SMALLER than the center hole in an 18" OE MDX wheel. The rubbery plastic puck at the end of the hoist cable would not fit through the center hole in the Mustang wheel. (I am posting this long-winded narrative to warn others about this potential problem.) So I had to laboriously file it down to fit. I do not recommend following this approach; it is time-consuming and frustrating. Either buy a wheel with the same center hole size as the OEM wheels or settle for a space saver spare. Unfortunately, the size of the center hole is typically not mentioned in wheel descriptions.

Absent these two issues, the spare tire kit is remarkably easy to install and it appears very sturdy (even after filing the puck to fit through the center hole in a Mustang GT wheel).

Looking ahead, I am concerned about whether the factory trailer hitch I bought will fit in the space available between a full size spare and the rear bumper structure. It should work; otherwise even the space-save spare is a fail when actually used on an MDX with a factory trailer hitch (and the flat full size wheel cannot be stored in the wheel well under the car). I will investigate this issue during the coming week.

 

^^ Did you actually put that spare on one of the wheel locations to test it out to make sure it'll work okay if you end up having to use it?

Note - I think another poster indicated wheels from the 2nd gen MDX would fit and that they might be available at a auto recycling yard. That's another way to go if getting a full size spare.

 

Although they only come in 17" sizes (I don't recall the width, perhaps 6.5"?), the first gen MDX rims will fit. The second gen MDX wheels have a different bolt pattern and therefore will not fit on the third gen.

I believe others here have successfully used RDX wheels as well on the third gen.

 

^^ Maybe the poster said 1st gen rather than 2nd gen. Regardless, it s/b validated before actually buying is one goes that route instead of getting the normal temp spare.

 

Hey just throwing it out there, I am also in Houston, we could look for a set of OEM 18" wheels, so you keep 2 and I keep the other 2 for spare/backup purposes.

Of course if we have enough people, each could get one out of the set. Just saying.

 

I'd do it... after i get my MDX in the next few weeks.

 

Hi All
Just to pass on some technical details on my recent experience with regards to ordering and installing a spare tire on our 2014 Base MDX.
As previous posts have described, I ordered the Acura OEM (Original Equipment Manufacturer) spare tire kit (P/N: 06421-TZ5-A00) from E-Bay for around $55 with $30 shipping (~$85 in total). The spare tire I ordered was the 'T165/80R-17 CONTINENTAL CST 17' found on the TireRack web site. $172 including delivery to my local Mr.Tire. Finally $6 to install tire on rim and all set!
Hope this helps - good luck

 

To AIN47:
I just looked up the kit you said you bought from Ebay for $55, and it is now $131+shipping, and it has only the jack, tire tool, and 18" wheel, no hoist included. https://www.ebay.com/p/7028446450

 

Full Size Spare with Trailer Hitch

I can confirm the factory hitch (08L92 TZ5 202) fits a full size spare (245/55/19) on a 2014 MDX. I previously purchased and installed a Curt 13146 and it fit the vehicle just fine but the full size spare would not, unfortunately not disclosed at the point of sale. The DrawTite 75225 will not fit a full size spare either. I was able to buy the factory hitch at the dealership at the "wholesale price" of $315. All in I think we spent about $800 on getting a full size spare on our MDX. $200 for the correct offset wheel on ebay, $100 for the parts to hold the tire in place and the wrench, $100 for the tire at Americas Tire, $30 for the trailer light kit, $315 hitch, plus tax... The picture on the bottom is the curt hitch not fitting......

 

Looks like Wheel is place in wrong direction... 20171028_161238.jpg

 

Yep, it is facing the wrong way. Easier to check tire pressure but it will beat up the wheel that way and there is more area for debris to collect in the wheel.