what do you think is the better one to choose out of these

[SNIPE]

hi, i am making a micro go-cart and after going through my parts i decided that the small wheels would accelerate the best, i also wanted wheels that were relatively wide for their given height.

i would be using these on flat surfaces of course, the tires are also slick tires and are stickier then other tires i tested on the same type of rim/wheel

i like the inner part of the wheel/rim because it allows the tire to compress a little bit for more grip because the rim is slightly smaller than the tire inner diameter, but this is also depending on the side parts of the rim, i have one where it is using two 8 tooth spur gears either side and one pulley bush in the middle, the other is two pulley bushes in the middle and a 10 tooth bevel gear either side. (it does not really matter that one of the pulley bushes is toothed.

the one with the bevel gears may make contact with the driving surface which is bad but it makes the tire harder which can be good and bad, where as the other one enables the tire to be softer and have more contact without the rim getting caught the driving surface.

the difference between hard and soft tyres is that the harder they are the less life the tyre has and depending on the the rubber used it can either be hard on the surface but easy/hard to compress or sticky on the surface and hard/easy to compress.

if both the hard and soft Tyre has the same properties the hard tyre would have more grip on a track but less life where as a soft Tyre would have less grip but more life

it would also depend on the dimensions etc but in a given case where they are both the same in properties and dimension it would be the case of that above.

if anybody can think of a rim middle and/or rim sides id like to hear them, just as long as is uses that Tyre.

also which one would you pick out of these two: i am thinking that the one that has the 8 tooth spur gears will be best because although its soft which means lesser grip the surface is flat and sticky which is good for what i want. it will maybe be too sticky on the driving surface maybe however.:

here is the rim assembly and both types:

[DLuders]

@ SNIPE: Bricklink's Tire On Wheel Relationships webpage will show what wheels fit the tire you have chosen.

Why are you so concerned about "tire wear", when you can get replacement tires for very little money?

[Silcantar]

Those wheels are much too small to be practical for any Technic models. If you're building a Technic model, you should probably use larger wheels that are intended for Technic models. If you want to use those wheels, you should stick with the System hubs they were designed for.

[Brickend]

That is the oddest explanation of hard and soft tyres that I have ever read.

[SNIPE]

i cant see any other tires like that

the tire wear thing is just a point of reference , im not bothered about tire wear it just happens to work like that

i need the hub to be able to mash with the axle by having a cross hole since i need to have the wheels driven still by the motor and axle.

this is a technic part, it is from the LEGO 8430 mag wheel blaster which is a technic set and fits over a technic piece (i cant really name it properly of by heart)

i don't want to use bigger wheels and tires because i think these will be fine, on a life sized go cart they have wheels just like that.

if i need to i will look for alternatives but i still need help in finding the sides of the rim/wheel

i have not seen many other tires that are are as slick as that however

Edited July 30, 2011 by SNIPE

[DLuders]

@ SNIPE: From the Bricklink inventory of the 8430 Motorbike set (which is pictured below), could you find that "Technic piece" that you are talking about? What is the Bricklink Part Number of that piece?

[AndyC]

@ SNIPE: From the Bricklink inventory of the 8430 Motorbike set (which is pictured below), could you find that "Technic piece" that you are talking about? What is the Bricklink Part Number of that piece?

I believe it's this one, although it's only used in that set as a decorative piece. It normally shows up in System sets. I can't imagine you could make a Technic model in which they don't appear far too small to use as wheels (even of a go-kart)

[SNIPE]

I believe it's this one, although it's only used in that set as a decorative piece. It normally shows up in System sets. I can't imagine you could make a Technic model in which they don't appear far too small to use as wheels (even of a go-kart)

thats correct yes, i have a question, can this be used with a technic cross axle:

http://www.bricklink...em.asp?P=30027b

if that cant be used with a cross axle, how about using the geared winch barrel, the spikes will grip the tire, it has a cross axle and the dimensions are good

http://www.bricklink...=P&catString=88

http://www.bricklink...Item.asp?P=2585

not sure what the difference is between these two winch drums. the top one looks like the one i have.

EDIT:

after attaching the winch drum and tire together in LDD it shows that they do not work together at all.

Edited July 30, 2011 by SNIPE

[DLuders]

As shown on this Bricklink page, the 30028 "Black Tire Smooth Small Wide Slick" fits on a 30027b "Wheel 8mm D. x 9mm (for slicks), hole notched for wheels holder pin". Here is a picture of the two together:

The "Wheels Holder Pin" is not the same as a Technic Axle. Here is a 4870c05 "Plate, Modified 2 x 2 Thin with Dual Wheels Holder (type 1) and Black Wheels (30027b/30028)":

The 30635 "String Reel 1 x 4 x 2 Drum with Friction Spokes" has little "nubs" on the ends, even smaller than the "stud" on the end of the 6587 "Technic, Axle 3 with Stud" (also pictured below):

The 2585 "String Wheel 2 x 2 Drum" (pictured below) could slip over an axle, but how would you get the tire onto it? It seems too long for the tire.

Edited July 30, 2011 by DLuders

[SNIPE]

by pushing it on, the tires move a little so i can do that

as for the width, i did this in LDD and it did not work at all.

are you sure both drums cant have a cross axle through them?

whats the length of each of these drums in say MM if you know/can find out

i have seen a couple of other things that would be better as rims, ill post pics of them tommorrow, one is just a 1x1 stud (exactually 1x1 stud) round system brick that is 2 studs tall some have a cross sectioned underside, others have a round.underside for either a stud or a cross axle or a non locking system pin.which you see on the gate bricks (for example)

Edited July 31, 2011 by SNIPE

[dhc6twinotter]

The following tires will fit a 1/2 bushing:

"13mm x 4mm" tires

"Tire Offset Tread Medium"

These tires also fit, but I can't find just the tires on bricklink:

Anyways, I suppose those tires are too narrow for what you want, but you may be able to double up the smaller tires.

[SNIPE]

i have tries using the below rims: with my current tires, they work fine but i still need the wheel to spin with the axle so that the power is transferred to the wheels properly.

also, adding two tires beside each other is a bad idea i think because it effects the wheel balance and adds weight and makes it more likely for failure the assembly, i like the tires i am using because ive always wanted to make a co cart with them but never got round to doing it.

i am thinking about using a metal axle that has the small rod attached to mesh with one of the following parts:

http://www.bricklink...m.asp?P=3062old

http://www.bricklink...tem.asp?P=3062b

http://www.bricklink...tem.asp?P=3062a

http://www.bricklink...sp?P=3062oldpx1

http://www.bricklink...asp?P=3062bpb37

http://www.bricklink...asp?P=3062bpb36

http://www.bricklink...asp?P=3062bpb35

http://www.bricklink...asp?P=3062bpb01

here is the axle:

http://www.bricklink.com/catalogItem.asp?P=pinpw2

when the axle and round brick are attached it will kind of look like this:

http://www.bricklink...asp?P=6933cpb01

http://www.bricklink...asp?P=6933cpb02

http://www.bricklink...tem.asp?P=6933c

i just hope that the axle meshes with the rounded brick even if it allows around 30% slip, the other alternitives i have tried with this brick have unsuitible properties because they allow for too much slip (around 85 to 90% and they don't stay on the end of the axle.)

i need a certain amount of slip because if you have too much the power from the motor will be wasted and not sent to the wheels

if i was using a technik engine where it does not deliver power then the wheels would be the power source but they would not transfer the power to the axles and the engine+axle transfer assembly.

Edited July 31, 2011 by SNIPE

[dhc6twinotter]

i have tries using the below rims: with my current tires, they work fine but i still need the wheel to spin with the axle so that the power is transferred to the wheels properly.

Sorry, I meant you could fit that tire around a 1/2 bushing. Not the rim.

[SNIPE]

Sorry, I meant you could fit that tire around a 1/2 bushing. Not the rim.

ah. well i tried another type of tire on a bush like that before and it worked fine but the tire was not what i was looking for but now i just took a look in LEGO digital designer and i put three bushes together and three tires on each bush, it was good because it was wider than the default tire and still a slick tire:

the default tires are attached to the assembly.

i will have to text both the default and the new assembly out in real life.

Edited August 1, 2011 by SNIPE

[Brickend]

Snipe, how is your twin engined car going? I think people would be interested in seeing your gearbox with the 6 micro motors after all of the questions you asked about it?

[SNIPE]

gah, i have had to put that on hold because:

it has issues still, the thing needs more gears and now it is kind of getting pointless because the gearbox in the 8448 is just as good for its size but isn't as well equipped.

because the technic challenge finishes on either the 21st of 23rd of august, the car will take around a year to make if i focus on it and not put it aside for a week or something.

maybe was being too realistic for LEGO.

anyhow, my entry for the challenge is 'fastest 4 wheeled vehicle.