2991Likes1/12 forum
01-09-2010 | 07:42 PM
To me, the Parma and Jaco tires/wheels seem to be identical except the Parma front wheels seem to be even looser in the bearings than the Jacos. I have had both peel.
The best thing I have found to reduce peeling is after truing, hit the outside edge with a tire file to make sure no rubber overhangs the wheel and then really round off that edge. Then glue the bead with thin CA. They can still peel but it helps.
The best thing I have found to reduce peeling is after truing, hit the outside edge with a tire file to make sure no rubber overhangs the wheel and then really round off that edge. Then glue the bead with thin CA. They can still peel but it helps.
01-09-2010 | 08:43 PM
Tech Champion
Joined: Nov 2001
Posts: 7,191
From: Hawaii, USA
I cracked nearly every front rim I ran on carpet at last year's Snowbirds...they still ran pretty good even cracked though. I was pretty rough on the car though so my results may not be typical.
01-09-2010 | 10:06 PM
01-10-2010 | 02:52 AM
Tech Fanatic
iTrader: (1)
Joined: Jan 2009
Posts: 786
From: Poland, Warsaw
Those bodies actually pre-date the HPI buyout of the original Hot Bodies company, based out of New Jersey. They Mark 2 is the HB Toyota GT-1, very similar in handling to the Protoform Nissan P-35, The Mark 3 is the HB Nissan NPT '91 which handled similarly to the Associated Nissan NPT body. Compared to the modern Proto, Parma, and Black ART bodies the HB shells would be lacking in downforce.
Maybe I will get some luck from Master and my AMR's bodies arrive to me
before race.
However, with mark 3 car should drive, it must
Regards!
m.
01-10-2010 | 08:32 AM
Tech Adept
Joined: Oct 2008
Posts: 190
From: Great Falls, MT
Does this information sound right to y'all?
Parma and Jaco use the same wheel and the same foam to produce their 12th scale foam tires.
CRC uses their own wheel and a different manufacturer of foam. Some call this GRP foam, from Italy.
Are there any other companies to use the same foam as CRC, but mounted to a different rim?
I ask because I'm tired of the foam on the Jaco and param wheels peeling back. I can run a clean race and come back the edges are peeled. I tried CRC foams and ran them several times. I had several wrecks, board taps etc, and when all was said and done there was no peeling. he only problem was the wheels were more brittle and most broke before I could wear the foam down. I've never broken a Jaco rear wheel.
I'm basically looking to get the foam I like (CRC, or GRP?) on a durable wheel. Thanks for any help.
AWD
PS- If wanted to remove old foam from a rim, which solvent would you think would remove the foam from the wheel best? lol, you know where I am going with this.
Parma and Jaco use the same wheel and the same foam to produce their 12th scale foam tires.
CRC uses their own wheel and a different manufacturer of foam. Some call this GRP foam, from Italy.
Are there any other companies to use the same foam as CRC, but mounted to a different rim?
I ask because I'm tired of the foam on the Jaco and param wheels peeling back. I can run a clean race and come back the edges are peeled. I tried CRC foams and ran them several times. I had several wrecks, board taps etc, and when all was said and done there was no peeling. he only problem was the wheels were more brittle and most broke before I could wear the foam down. I've never broken a Jaco rear wheel.
I'm basically looking to get the foam I like (CRC, or GRP?) on a durable wheel. Thanks for any help.
AWD
PS- If wanted to remove old foam from a rim, which solvent would you think would remove the foam from the wheel best? lol, you know where I am going with this.
Here are some steps I used when I ran Jaco's in the past. I think the problem is a substandard adhesive used to mount the foam.
1) peel up the outside edge right out of the box (5-7mm wide).
2) apply 3M weatherstrip adhesive with a small screwdriver or scrap lexan.
3) massage the edge to get full contact.
4) after it cures, super glue the rim seam and sidewall.
5) shape the sidewall on a truer. I go for a 15* angle back from the rim and then liberally radius the shoulder of the tire.
Frankly, Jaco's are a pain in the @$$. This seems like a lot of work, but we don't have those damn brushed motors and round cells to maintain anymore do we?
I do steps 4 and 5 from above on every set of tires I run. Consistency pays off at some point? Or, it should, I think?
Aaron
01-10-2010 | 09:44 AM
I ran the mark 3 body before and it was stable and felt the same as a Speed 12 (at least to me). However, it was about 0.1 to 0.2 sec per lap slower than the Speed 12.
01-10-2010 | 09:48 AM
01-10-2010 | 10:10 AM
Tech Adept
Joined: Oct 2008
Posts: 190
From: Great Falls, MT
Harder to find. I have bought them by the case when I track them down, often on RC-Tech or Ebay.
A few other sources listed below. If you go with the "new" style GRP tire, they are now made in the larger diameter size. Same durability as the smaller yellow wheel.
You will find several runs of tires that come from GRP and are the same product. GRP/TRC/Speedmind.
Try some out. If they work for you, buy in bulk as they are harder to track down on short notice.
These are the same tire, produced by GRP and would run the same as a TRC tire
http://www.rcmart.com/catalog/tire-w...facturers_id=0
http://www.the-border.com/product.ph...9&bestseller=Y
http://www.stormerhobbies.com/cgi-bi...umb=on&smode=0
A few other sources listed below. If you go with the "new" style GRP tire, they are now made in the larger diameter size. Same durability as the smaller yellow wheel.
You will find several runs of tires that come from GRP and are the same product. GRP/TRC/Speedmind.
Try some out. If they work for you, buy in bulk as they are harder to track down on short notice.
These are the same tire, produced by GRP and would run the same as a TRC tire
http://www.rcmart.com/catalog/tire-w...facturers_id=0
http://www.the-border.com/product.ph...9&bestseller=Y
http://www.stormerhobbies.com/cgi-bi...umb=on&smode=0
01-10-2010 | 12:12 PM
Tech Fanatic
Joined: Jun 2005
Posts: 900
There was a fire early last year destroyed the GRP factory in Italy. Since then, there have been no GRP 12th tyres seen in Europe. Although you may find some secondhand, all the new 12th tyres these days come from Jaco - Jaco Prism, Parma Blackhawk, Mobgums - except those from Gekko, BSR and RC4Less. HTH
01-10-2010 | 02:03 PM
Tech Regular
Joined: Sep 2008
Posts: 416
From: Worksop, Nottinghamshire, UK
There was a fire early last year destroyed the GRP factory in Italy. Since then, there have been no GRP 12th tyres seen in Europe. Although you may find some secondhand, all the new 12th tyres these days come from Jaco - Jaco Prism, Parma Blackhawk, Mobgums - except those from Gekko, BSR and RC4Less. HTH
Trev