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FORDTAMIYA

BIG BEAR TYRES

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Hi, i'm a newbie on here so please be gentle.

 

In the loft I found an rc car i didnt even know we had!!

 

Anyways turns out its a marui big bear in need of 4 new tyres as the old ones have nearly totally disintrgrated, just like the tamiya escort.

 

Were can i get some new tyres from please?

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There is a shop at the end of the rainbow.

No kidding, but its hard to find decent ones, if you plan to run it you could do a conversion to lunchbox size tires and rims. Other point to check is which gears your BB has. The first version with two gear differential can wear fast under to much strain.

There should be several threads about the BB try the search function.

If you need manuals send me a pm.

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Ah and there is a Marui group on Facebook, great for parts.

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Add me to this list of people wanting to know where these magical tires can be found. I have a Big Bear on the way.

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Tires are even worse to find compared to gears, as gears will at least not dry out as the years pass by. 

I was lucky to buy 2 bears, with an extra set of decent tires to make one original bear. And have one other set of used tires that are in one piece, but the rubber feels very dry.....

I think that unfortunately, the search, and practical use, for original tyres is over as time has degraded the original rubber too far... Unless they were stored in sealed plastic bags in a dark cool place... 

Would be nice if a re-production run was done, as tires and gears are the only parts of a bear that need replacing. Most other components will last. ^_^

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On 10/12/2019 at 1:07 PM, Ray_ve said:

Would be nice if a re-production run was done

I've seen other people making reproduction tires for other models. Making repro sets for these seems to be a good biz opportunity. It would be awesome if such repro tires would be made of thicker rubber. The original ones are too darn thin! :(

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Poor-able polyurethane rubber is available.
I guess the biggest challenge would be to make a decent negative shaped container to poor it into.

Either make a container by copying a good tire, or for increased accuracy make a container using a 3D printer or CNC machine.

Sounds like a nice project for the christmas-holiday. :lol: But I would buy a better resin-based 3D printer first.

Agreed that the rubber should be a but thicker... Difficult to say how much as the suspension of the Bear is like the Clodbuster, the tires are the main springs.

 

That only leaves the gears! Maybe somthing with a negative container made from gypsum and poor molten zink or aluminium into it?? Or try to print resin gears. :lol:

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