[bwdbrn1]

The 8" wheels of the HR214 will give a max height of cut of 3". So I'm wondering if larger diameter wheels would work. I went and bought some 10"ers, but they rubbed the deck (didn't consider that...) It looks like there is space for 9" wheels on the rear, but the front is iffy. Looks like it would rub the deck a bit, but thinking I could maybe put in a spacer to move them out from the deck enough to allow them to bolt on. Has anyone had luck putting larger wheels on an HR214? (And perhaps the same situation goes for the HR215 as well.)

You’re right about the HR215. It shares the same deck with the HR214.
You may be able to slip washers over the axel to push the wheels out a bit and you may have to use a longer bolt to reach in. But, if I remember right, the factory bolt tightens against the axel so you might have to find a suitable spacer to fill the gap created by spacing the wheel out.
I hope that all make sense, I can picture it in my head but I din’t know if I explained it well.

 

[bwdbrn1]

I shook some cob webs out of my noggin and recalled something I had done a few years back one day while bored. There might be a solution to what you are trying to accomplish, or maybe not. At any rate, here is the link.

HR215 dually...

What do you do when you might need a little more traction or flotation out of your walk behind mower? Why not add a set of dual wheels? Hey, we've got four wheel drive mowers now, so why not? But how to do this? The HR215 wheel axels are mounted to the height adjuster arms and the wheels are...

www.mylawnmowerforum.com

 

[bwdbrn1]

I'm back to report success! I found a set of used 9" wheels off an HRR216: Honda part numbers 44710-VH7-010ZB (front), and 42710-VH7-010ZB (rear with the metal drive gears). I used 1/2" inside diameter shaft collars as spacers - they have a thickness of 13/32", and that was enough to move the front wheels outward so that they just barely cleared the deck. For the rear wheels, I didn't even need to remove the gears because mine is a push only model. If you had a drive, they wouldn't work because the gears on the 9" wheels wouldn't be the same as those on the standard 8". And actually I didn't need the spacers on the rears to clear the deck, but without them, the wheels would rub the height adjustment levers, so were necessary for that purpose. Then to hold the wheels onto the spindles, I replaced the standard 1/2" long flange bolts with metric M8 x 25mm (1") long 1.25 thread pitch flange bolts and they fit perfectly. I also added a washer to increase the holding area of the flange bolts on the wheels. So now the 9" wheels will allow me a 3 1/2" maximum cut height over the 3" max of the 8" wheels!
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Nice!