Did Tamiya ever do 1.7" wheels, because J Concepts are doing modern tyres

[ThunderDragonCy]

Came across these cool looking old school balloon style tyres on the J Concepts website that seem to be an original RC10 size, 1.7"

https://jconcepts.net/search.asp?keyword=1.7"

AFAIK Tamiya went from 1.5" Hornet/Grasshopper to 1.9" Grasshopper 2 onwards to 2" Wild One/Fox/Astute. Did they ever do a 1.7"? I think these tyres would cool as badword on an old school Tamiya.

[Frog Jumper]

The Brat wheels are 1.7, as are the FAV/RR Wheels.

I asked about something related a couple of years ago but didn't get very far.

Terry

 

[El Gecko]

1 hour ago, ThunderDragonCy said:

1.9" Grasshopper 2

Only the GH2 fronts are 1.9", the rears are still 1.7

[CMshooter]

1 hour ago, ThunderDragonCy said:

Came across these cool looking old school balloon style tyres on the J Concepts website that seem to be an original RC10 size, 1.7"

https://jconcepts.net/search.asp?keyword=1.7"

AFAIK Tamiya went from 1.5" Hornet/Grasshopper to 1.9" Grasshopper 2 onwards to 2" Wild One/Fox/Astute. Did they ever do a 1.7"? I think these tyres would cool as badword on an old school Tamiya.

 

I think I would try to stretch them onto BBX rims if I had one.  Keep the cool rims and get some more modern performance.

[ThunderDragonCy]

56 minutes ago, El Gecko said:

Only the GH2 fronts are 1.9", the rears are still 1.7

I have some GH2 rears here and they are 1.8" on the bead bed. Is that to stretch or hold onto the 1.7" tyres?

[Mad Ax]

I bought a set of Double Dees a few years back when I was racing a Sand Scorcher on astro.  I was told they were a perfect fit on the Rough Rider rear wheels but I couldn't get them to fit, they were way too loose and the beadlock-style assembly wouldn't grab the bead.  I've never used them.  But they do look awesome cool.

[El Gecko]

2 hours ago, ThunderDragonCy said:

I have some GH2 rears here and they are 1.8" on the bead bed. Is that to stretch or hold onto the 1.7" tyres?

Not 100% sure, but these Kyosho Optima tires are listed as 43mm/1.7" and they fit the GH2 rear wheels perfectly.

https://www.amainhobbies.com/kyosho-optima-rear-pin-tires-2-m-kyoott243mb/p512316

Whatever the exact measurement is, the rear GH2 rims and tire beads are definitely smaller than the fronts.

[Mouc-RC]

Happy to be corrected if I'm wrong, but to me Tamiya messed up their first sets of rims:

- Sand Scorcher/ Super Champ ones: the main bead is 1.55 for the look, but the clamping bead is smaller, @1.3 inches.
- Rough Rider/FAV: the main bead is 1.7, but the clamping bead is smaller, @1.5 inches.

GrassHopper I & II I'm not sure, never had one of those "unsuspended" buggies ;)

They also made some other weird things: Stadium Raider's rims are 2.1 inches (from my measurements at least)

So as @Mad Ax said, you can hardly use modern 1.55 or 1.7 tires, on which the clamping bead equals the main bead. Too bad :/

[ThunderDragonCy]

Thanks for the knowledge and wisdom everyone. 

[Honza]

What are outer dimensions of these tires?