Tamiya 4wd Buggy For Monster Tyres?

[bassmanesh]

Having recently got a Mad Bull (which I love throwing around the building site I live on ) I am now wondering if anyone knows of a 4WD buggy chassis that could be altered to run on Mad Bull/ Lunchbox tyres?

While the 2WD of the Bull is fun over the piles of gravel and sand about, I believe/ hope 4WD would be even more mental but don't want to go the dual motor route.

Any ideas/ experience would be great.

Chris

[Mountain]

Having recently got a Mad Bull (which I love throwing around the building site I live on ) I am now wondering if anyone knows of a 4WD buggy chassis that could be altered to run on Mad Bull/ Lunchbox tyres?

While the 2WD of the Bull is fun over the piles of gravel and sand about, I believe/ hope 4WD would be even more mental but don't want to go the dual motor route.

Any ideas/ experience would be great.

Chris

Interesting idea. Depends on a few things including offset of the wheels. The Wild Dagger Wheels with MB tyres might be an approach as they are 0 offset so might fit on something like an Avante. Might not steer though. Will have to a look at my Avante

[markbt73]

Actually, you can take just about any modern-ish 4WD buggy and put 2.2" truck wheels/tires (or Wild Willy 2 rears on all 4 corners) on it. Most of them use 12mm wheel hexes already, so they'll bolt right on. I'd imagine a Blazing Star/Dirt Thrasher would be a good candidate for this.

Just remember to gear it way down, so you don't cook the motor.

[adam1973]

A Baja King/Champ (TL01 based) will work with the 2.0 LB wheels & tyres or the 2.2 Wild Dagger parts. Look here; http://www.tamiyaclub.com/showroom_model.a...40&id=17312 for inspiration.

[terry.sc]

The bigger wheels can fit on older cars, but all modern 4wd buggies have long front suspension arms which mean the wheels will hit the wishbones when you try and steer.

The older TL01B based cars still have shorter wishbones, so those will probably be your best choice. You would also be better going for stadium truck size tyres rather than Tamiya monster truck size ones, as the smaller diameter stadium truck tyres means you have a better chance of getting the gearing low enough so the motor has enough torque to turn the wheels.

[mymonsterbeetleisbroken]

Use a thundershot

Its ultra tough and handles well. Plus its easy to get parts for as tamiya re released it a few years back, and are re releasing the same chassis again soon.

[bassmanesh]

Thanks for all your help and advice so far. Two questions from the replies;

1) Am I right in thinking that stadium truck tyres are the ones used on the TLT and Emaxx trucks?

2) Could someone advise me how I'd go about gearing down the drive system? I've never changed gear ratios (always built kits with a single set of drive gears/ no gearing option) so wouldn't know where to start.

Thanks again for the help

Chris

[Mountain]

Thanks for all your help and advice so far. Two questions from the replies;

1) Am I right in thinking that stadium truck tyres are the ones used on the TLT and Emaxx trucks?

2) Could someone advise me how I'd go about gearing down the drive system? I've never changed gear ratios (always built kits with a single set of drive gears/ no gearing option) so wouldn't know where to start.

Thanks again for the help

Chris

1) No these are different tyres. The TLT ones are smaller I think and the E Maxx are bigger/widder.

2) It should tell you in the manual what pinions can be used in a particular car. (Manuals on TC) Some were fixed ratios as the motor could not move. Others where the motor could be moved or had different screw positions for each pinion. In either of these you would want to get the pinion with the lowest amount of teeth. If the car had an adjustable spur gear then you would want to get the one with the highest amount of teeth. This would give you the best results to ensure you didn't overload the motor.

[Mountain]

Oh and yes the Wild Dagger wheels and tyres do fit the Avante and allow steering but look a bit daft as they are 0 offset so you can see all the suspension. That and the supension will probably break if you hit the kerb.

[terry.sc]

1) Am I right in thinking that stadium truck tyres are the ones used on the TLT and Emaxx trucks?

No, stadium trucks are like Tamiyas Stadium Blitzer and Blitzer Beetle, and the Associated RC10T4.the tyre size is in between the TLT tyres and Blackfoot size tyres. They will give you extra clearance but the smaller diameter means there will be less strain on the gearboxes and motor, which aren't designed for the larger diameter tyres.

2) Could someone advise me how I'd go about gearing down the drive system? I've never changed gear ratios (always built kits with a single set of drive gears/ no gearing option) so wouldn't know where to start.

Fit the smallest size pinion that will fit the truck. If you use the same gearing as standard the motor will struggle to move the buggy as again the tyres are too big. This is why 4wd monster trucks use twin motors, to give the extra torque needed to power it.