How to: fit full size spare in 2010+ HB - Mazda3 Forums : The #1 Mazda 3 Forum
 
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post #1 of 3 (permalink) Old 02-19-2012, 08:24 PM Thread Starter
Grand Am Series
 
Join Date: Aug 2010
Location: Boise, ID
Posts: 373
How to: fit full size spare in 2010+ HB

The trunk area of the 2010+ HB can actually accommodate a full size spare, the problem becomes that the foam insert holding the tools will not be resting on the floor of the trunk area but instead on the tire itself. This can cause a very annoying sound as it rubs and shifts during normal driving.

To fix this I added wooden block under the foam, attached with nails pounded half way into the blocks so that they would stick into the foam and old the blocks in place, I also used glue to further keep things from shifting. The blocks must be just hight enough so that the level of the top of the foam insert is just about even with the level of your spare tire. This way when the carpet section is placed over the tool holder it will rest on both the tool holder and spare tire in the center and will not shift up/down when loads are placed on the edges of the compartment.

The chief advantage is that you get a fully functional and stable trunk floor with a full size spare below it without any annoying noises during normal driving. Having a full sized spare is a far safer option should you end up needing it when out on the interstate, the stock doughnut is just not cut out for freeway driving and in rain/snow it is especially dangerous to use.

This is the foam insert upside down with the wooden blocks placed appropriately


This is a closeup of the full size spare in its compartment


This is the trunk area with the carpet placed over the tool holder and spare tire


This shows the car jack compartment door clearing the floor


Something like this will likely also work for the sedan, but I don't have one to try it on.

-Shaun
[size=6pt]Mods: 17x7.5 rims w/ Conti DWS tires | 4 75W kicker speakers | Memphis 300W amp | full size spare | BC Condenser kit w/ extra grounds | CS SRI w/ box | timing advance | upgraded horn | CS LED kit | Axela badge | alu pedals | Momo shift knob | Alu fuel door | footwell LEDs | VTCS delete | TB coolant bypass | L fog light vent | bi-xenon HB/LB | HID fogs | SB LED turn sigs | LED DRLs | LED reverse lights | painted foglight trim | LED tail lights | LED reflectors[/size]
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post #2 of 3 (permalink) Old 04-04-2012, 11:35 AM
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Join Date: Jun 2010
Location: Orange Park FL
Posts: 497
Re: How to: fit full size spare in 2010+ HB

Very nice. I would like to do something like this with mine.


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post #3 of 3 (permalink) Old 03-31-2019, 12:53 PM
Bicycle Rider
 
Join Date: May 2007
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Only problem is the back will not lay flat with the rear seats folded. Another solution to gain more storage space is to dump the foam and build a simple wood grid to support bottom.
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