Cutting Down Foam Tyres
10-04-2004, 09:38 PM
#1
Cutting Down Foam Tyres
I have some 30mm foam tyres I want to use and need to cut them down to 26mm. What is the easiest way to do this. Is it just a matter of putting on a tyre lathe and getting a knife to the tyre? Im worried about not getting exactly 26mm width which is imperative.
10-04-2004, 10:00 PM
#2
Re: Cutting Down Foam Tyres
Originally posted by Oasis2001
I have some 30mm foam tyres I want to use and need to cut them down to 26mm. What is the easiest way to do this. Is it just a matter of putting on a tyre lathe and getting a knife to the tyre? Im worried about not getting exactly 26mm width which is imperative.
I have some 30mm foam tyres I want to use and need to cut them down to 26mm. What is the easiest way to do this. Is it just a matter of putting on a tyre lathe and getting a knife to the tyre? Im worried about not getting exactly 26mm width which is imperative.
10-04-2004, 10:08 PM
#3
Re: Cutting Down Foam Tyres
Originally posted by Oasis2001
I have some 30mm foam tyres I want to use and need to cut them down to 26mm. What is the easiest way to do this. Is it just a matter of putting on a tyre lathe and getting a knife to the tyre? Im worried about not getting exactly 26mm width which is imperative.
I have some 30mm foam tyres I want to use and need to cut them down to 26mm. What is the easiest way to do this. Is it just a matter of putting on a tyre lathe and getting a knife to the tyre? Im worried about not getting exactly 26mm width which is imperative.
Otherwise, make sure the tyre is rotating away from you when you do it, or you might need band-aids.
10-04-2004, 10:49 PM
#4
Re: Re: Cutting Down Foam Tyres
Originally posted by Atomix
Just send 'em to Besercoe, he loves doing it.
Otherwise, make sure the tyre is rotating away from you when you do it, or you might need band-aids.
Just send 'em to Besercoe, he loves doing it.
Otherwise, make sure the tyre is rotating away from you when you do it, or you might need band-aids.
Chris, put tire on lathe, making sure it is spinning away from you, use a fresh stanley knife blade (scalpel no good) use only the TIP to cut into the tire, measuring width is quite easy, if you are starting off with a 30mm tire and you want a 26mm tire, then obvioulsy you need to cut off 4mm, which if you cant estimate 4mm you need to go back to preschool. slowly but firmly push the tip into the foam when you feel the rim, give a bit more pressure and cut through the rim. Make sure to do it reasonable fast, holding the blade there will just heat up the blade and melt the rim. Then use a spatula with sandpaper on it to smooth the edge of the tire. if you are unsure cut less than 4mm off and measure the tire. and repeat process.
Estimating 4mm is generally quite easy, and even if you cut it fractionally less than 26mm you will not notice the difference.
10-04-2004, 10:59 PM
#5
Or just get some 26 mm tyres.
No need to cut them down.
No need to cut them down.
10-05-2004, 05:44 PM
#6
Originally posted by opposite lock
Or just get some 26 mm tyres.
No need to cut them down.
Or just get some 26 mm tyres.
No need to cut them down.
Coxy.
10-05-2004, 07:38 PM
#8
Tech Master
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Originally posted by WC
Dampen your knife blade.
Water is the best lubricant for cutting foam rubber.
Dampen your knife blade.
Water is the best lubricant for cutting foam rubber.
10-05-2004, 09:16 PM
#11
Tech Regular
iTrader: (16)
how do you figure that?
when at 30mm width, the centre of the rim/mounting hub is 15mm from the back face (assuming its on the centreline of the rim, it may not be, and i dont have a set of rims here to check)
when cut to 26mm (4mm taken from the back of the rim i presume), the centre of the rim is now only 11mm from the back face....
the centre of a 26mm rim is 13mm from the back face, your cut rim is only 11mm, so you end up with a -2mm offset.
the only way to keep the same offset would be to remove 2mm from either side of the wheel
when at 30mm width, the centre of the rim/mounting hub is 15mm from the back face (assuming its on the centreline of the rim, it may not be, and i dont have a set of rims here to check)
when cut to 26mm (4mm taken from the back of the rim i presume), the centre of the rim is now only 11mm from the back face....
the centre of a 26mm rim is 13mm from the back face, your cut rim is only 11mm, so you end up with a -2mm offset.
the only way to keep the same offset would be to remove 2mm from either side of the wheel
10-05-2004, 09:19 PM
#12
Originally posted by domo
how do you figure that?
when at 30mm width, the centre of the rim /mounting hub is 15mm from the back face.
when cut to 26mm (4mm taken from the back of the rim i presume), the centre of the rim is now only 11mm from the back face....
the centre of a 26mm rim is 13mm from the back face, your cut rim is only 11mm, so you end up with a -2mm offset.
how do you figure that?
when at 30mm width, the centre of the rim /mounting hub is 15mm from the back face.
when cut to 26mm (4mm taken from the back of the rim i presume), the centre of the rim is now only 11mm from the back face....
the centre of a 26mm rim is 13mm from the back face, your cut rim is only 11mm, so you end up with a -2mm offset.
10-05-2004, 09:29 PM
#13
Originally posted by domo
how do you figure that?
when at 30mm width, the centre of the rim/mounting hub is 15mm from the back face (assuming its on the centreline of the rim, it may not be, and i dont have a set of rims here to check)
when cut to 26mm (4mm taken from the back of the rim i presume), the centre of the rim is now only 11mm from the back face....
the centre of a 26mm rim is 13mm from the back face, your cut rim is only 11mm, so you end up with a -2mm offset.
the only way to keep the same offset would be to remove 2mm from either side of the wheel
how do you figure that?
when at 30mm width, the centre of the rim/mounting hub is 15mm from the back face (assuming its on the centreline of the rim, it may not be, and i dont have a set of rims here to check)
when cut to 26mm (4mm taken from the back of the rim i presume), the centre of the rim is now only 11mm from the back face....
the centre of a 26mm rim is 13mm from the back face, your cut rim is only 11mm, so you end up with a -2mm offset.
the only way to keep the same offset would be to remove 2mm from either side of the wheel
What i think you are referring to is called the track width. ie the distance between the centre points of each wheel. in this instance narrowing the rim will effectively widen the track width by the same amount that you cut down the wheel.
I have never had anyone comment on the track width in RC, only the overall width of the vehicle.
10-05-2004, 10:04 PM
#14
I just leave my tires at 66mm and wear them down. When I cut them down to 26mm I can't get enough ride height.
Coxy.
Coxy.
