Advantage of 2 Front Trucks On a Buttboard

[bemmis]

i buttboard on my buttboard frequently around 50 mph. it has a wheelbase right now with 4 wheels around 36" with 80a lime reflex gumballs. randal 180 front, 13* dewedged indy 215 rear.

if i were to move the rear wheels up front for a 2 randal truck combo up front and get a pair of pink bigzigs for the rear would it ride better? (75mm because the gumballs have worn)

whats the deal with 2 front trucks anyway?

[chrismcb]

i buttboard on my buttboard frequently around 50 mph. it has a wheelbase right now with 4 wheels around 36" with 80a lime reflex gumballs. randal 180 front, 13* dewedged indy 215 rear.

if i were to move the rear wheels up front for a 2 randal truck combo up front and get a pair of pink bigzigs for the rear would it ride better? (75mm because the gumballs have worn)

whats the deal with 2 front trucks anyway?

Will it ride better? Dunno, don't know how it rides now. What is the problem, why do you think it needs to ride better?

The main reason for multiple trucks up front is more traction. I also think it helps to reduce wobbles.

But then again, a buttboard won't be race legal with 6 wheels. 4 wheels upfront definitely gives you more traction. But if you are just riding recreationally, your setup should be just fine.

[bemmis]

Will it ride better? Dunno, don't know how it rides now. What is the problem, why do you think it needs to ride better?

The main reason for multiple trucks up front is more traction. I also think it helps to reduce wobbles.

But then again, a buttboard won't be race legal with 6 wheels. 4 wheels upfront definitely gives you more traction. But if you are just riding recreationally, your setup should be just fine.

i was mostly just curious. i dont really race, it IS for recreation. based on your input i think ill keep it with 4 wheels until i feel like i need more traction or stability. thanks.

[clayski]

Here's a couple of "just for recreation" 13x48 inch Butt boards. Rules were put in place so you can practice stretching 'em.

One has 2 two 205 luge trucks up front and a 170 on splitters at the rear...........it rides different!
The other runs two 360x12.7mm axles with double wide big Zigs.

It makes them small luges really.

[speshlspeclsteak]

Here's a couple of "just for recreation" 13x48 inch Butt boards. Rules were put in place so you can practice stretching 'em.

One has 2 two 205 luge trucks up front and a 170 on splitters at the rear...........it rides different!
The other runs two 360x12.7mm axles with double wide big Zigs.

It makes them small luges really.

why is there only one spliter?

[Alpha06]

why is there only one spliter?

There are 2...the angle of the photo makes it seem like 1

[robert borek]

where do you get splitters?

[A-Drain]

where do you get splitters?

Try Hello, Silkeez White Page that is what Clayski is running.

[chrismcb]

where do you get splitters?

You don't. Put another truck on.

A second truck works so much better than splitters. If you really need the extra traction a second set of wheels will provide, you will be better off adding a second truck.

[N88]

Here's a couple of "just for recreation" 13x48 inch Butt boards. Rules were put in place so you can practice stretching 'em.

One has 2 two 205 luge trucks up front and a 170 on splitters at the rear...........it rides different!
The other runs two 360x12.7mm axles with double wide big Zigs.

It makes them small luges really.

those are really filthy setups, i would imagine that you would bend alot of axels in that double wide wheel setups.

[rawls]

...The main reason for multiple trucks up front is more traction. I also think it helps to reduce wobbles....

It doubles the effective footprint on the road, increasing traction. The two trucks will change the dynamic response, by lowering the effective pivot point of the truck (as a combination of two trucks) and increasing stability drastically. Similarly as drop style board set-up.

[clayski]

The splitter rear makes for a board into a great corner slider. It doesn’t have the foot print that two trucks provide as there is no angle difference in the two axles on the splitter set up, as compared to the double truck option. You do need this turning angle difference between the two axles if you want precise traction as the wheel base difference between the front / rear wheels then the rest, comes into play. But like I said, it makes for a rig that’s great for sliding through corners; after all it is a recreational ride.

No…..the double wide bends no axles……it is 12.7mm thick (that's half an inch). I weigh 220lbs and these axles have been flogged hard for 12 months with outstanding results. They are made to go on a Lott Speed Stick luge. They have passed the "tough enough" test well and truly.

[chrismcb]

It doubles the effective footprint on the road, increasing traction. The two trucks will change the dynamic response, by lowering the effective pivot point of the truck (as a combination of two trucks) and increasing stability drastically. Similarly as drop style board set-up.

How does it lower the pivot point?

I was referring to the fact that you know have two bushings working together instead of one. I don't know pysics enough to know how the two "springs" working together helps. I just know that I am less likely to get wobbles with dual trucks.

[BluegrassSurfer]

I was referring to the fact that you know have two bushings working together instead of one.

Exactly. Two bushings doubles truck tension at the front of the board, making wobble less likely. 4 wheels increases front traction into turns. Two independent axles up front improves stability over an uneven surface -- smoother ride.

[rawls]

How does it lower the pivot point?

I was referring to the fact that you know have two bushings working together instead of one. I don't know pysics enough to know how the two "springs" working together helps. I just know that I am less likely to get wobbles with dual trucks.

If you take the new ground footprint of the 4 wheels and their relationship to the pivot point. The proportion has decreased, the instant center relationship has changed. When the instant center changes, the dynamic response changes. A taller instant center will drive towards a less stable situation. A lower instant center will towards a more stable system. the turning response may change somewhat, but primarily its a dynamic stability issue. Its a very similar effect to lowering the CG by means a dropped deck. a tie bar system will respond nearly equal in this scenario.

another player will be increased dampening thru two sets of bushings, making an overall stiffer truck assembly. this will change the dynamic response too. a tie bar system does not benefit from this scenario.

Also the dampening of the turning action by having two independent trucks sort of working against each other will stabilize the truck assy, even though the turning action is still accomplished effectively. A tie bar system does not benefit from this scenario.

[BluegrassSurfer]

Dropping the deck below the truck pivot stabilizes because the board's/deck's tendency is to automatically return to center/level after leaning/turning, less responsive to leaning (stabilizing). Placing the deck above truck pivot, the deck wants to continue in the same direction of the lean further intensifying the turn (truck does not automatically return to center) -- more responsive but making wobbles much more likely.

Edit: In other words, if you remove the bushings from the trucks, a deck below the pivot point will remain level, above the pivot point it will lean to one side or the other unless perfectly balanced.

4 wheels up front means more wheel surface area making contact with the road. More wheel surface area = greater friction. Greater friction = more traction in turns.