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Rametch Billet Wheels - Tarmacs - Some observations

Discussion in HPI Baja Tires and Wheels forum, started by Baja Storm.

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  #1  
Old 05-01-2008, 01:39 PM
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Baja Storm Baja Storm is offline
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Rametch Billet Wheels - Tarmacs - Some observations

Just a few observations re Ramtech billet wheels, tarmac buster tyre design, beadlocks etc.

First of all – let's be clear that I love my Ramtech rims!

Don’t really want to talk taping or gluing here, as its been discussed in length elsewhere, however it does have some bearing on the subject.

Some areas have been touched on briefly a while back. All is great in hindsight, but I did not pick this up early enough in my research. Just thought I’d give this important item a little more exposure - especially as it may have contributed to a few tyre failures.


HostileHobby give some great advice once you receive their tyres (don’t think its on the HH website) – “The HPI wheels often have a sharp lip on both edges of te outer whell ring. Be sure to sand this area smooth with sandpaper to ensure the longest life for your new tires. ….”
This advice will of course apply to whatever tyre is being run.





The rear tarmacs in the pics are the original first set installed and were not belted (taped) – foams were glued. Current ones have been run for a few months and are belted (along centre of tyre only, foams are glued) – checks will be made shortly on the condition of these.

A sharp edge exists on the Ramtech Billet wheels – (please shout up if I’m the only one with this - but could not find any other info) – which needs to be dremelled down smooth.

Granted, the lack of belting will no doubt have contributed to the stress on the tyres, but the sharp edges D will also have been a major factor.

The lack of side wall (see DIM C) to the inner rear tyres is a key weakness with the tarmac buster design (or potentially any design, based on the differing diams of the inner and outer faces of the stock wheels) – means potential damage can occur to the wheels in this little protected area – not good if you’re running billet wheels. The foam is also thinnest at this point.



The front tarmac design is great – it has a thickened projecting bead on the inner face (DIM A). There is no damage, fractures, stress marks anywhere on the tyres or wheels.

This is the only area that has been damaged on the rear wheels. All other parts have suffered no damage.

A ‘heavy duty’ inner beadlock design (similar to the outer ones) would not go amiss and help protect both the side wall (or lack of it) and wheel rims, particularly if running alu ones. Extenders may of course be a requirement for clearance.

I know some key manufacturers have already / are addressing the thickening of the bead wall dim in the latest tyre designs (and also in their on road tyres?…please)

Any thoughts..anyone had similar issues?


NB.The illustrations are based on the rtr tyre wheel section (page 26 RTR manual) - the SS manual does not contain the relevant diagrams.
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  #2  
Old 05-01-2008, 01:52 PM
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DIABLOTAC78 DIABLOTAC78 is offline
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all i can say is bravo well done bajastorm , they should do something for the rim sharp edge.
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Old 05-01-2008, 02:35 PM
bigbanko bigbanko is offline
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Some great info there.

Thanks for taking the time to put together an in depth illustration of usefull information.
I am sure many will benefit from it.
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Old 05-01-2008, 02:41 PM
USABaja5 USABaja5 is offline
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Hell, I never noticed that. I'll put a radius on the next run.
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Old 05-01-2008, 08:48 PM
Silverback RC Products Ltd Silverback RC Products Ltd is offline
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Some heavy duty inner plastic beadlocks (not the current HPI offerings, but something much stronger ). If the rings also were slightly thicker (+1mm perhaps) at dimension C of the rear inner edge would offer substantially greater protection to any rim. The beadlock would absorb more of the impact, and believe me there are some plastics that can really take a beating.
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Old 05-01-2008, 08:51 PM
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Monsterman Monsterman is offline
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BS you went out of your way on this one bud!! Real interesting and nice info to know for those thinking about or who already own a set of the awesome Ramtech Rims.. Great info and pictures all in one place NICE JOB
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Old 05-01-2008, 09:00 PM
USABaja5 USABaja5 is offline
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I was concerned mostly with the side to side type of flexing, and never really thought of the ballooning.
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Old 05-01-2008, 09:07 PM
Silverback RC Products Ltd Silverback RC Products Ltd is offline
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Its a relatively simple fix though Rob, and just makes a great product even better.
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Old 05-01-2008, 09:29 PM
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WOW is all i can say. Great pic! i can HONESLY say that ancered ALL my tire questions!.
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Old 05-02-2008, 02:21 AM
deznuts84 deznuts84 is offline
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Wow bajas storm it looks like you did your home work, great info!!
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Old 05-02-2008, 04:26 AM
kongman kongman is offline
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i was wondering why the ramtechs where chewing up the tires .......i had exactly the same brobs running on dirt.............
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Old 05-02-2008, 08:07 AM
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Thanks guys! Good to know I wasn't imagining it all
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Old 05-02-2008, 09:01 AM
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mad scientist thinks that way well done


Quote:
Originally Posted by Baja Storm View Post
Thanks guys! Good to know I wasn't imagining it all
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Old 05-02-2008, 09:55 AM
merlinuk merlinuk is offline
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Top work fella, looks like we've all learnt something
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Old 05-02-2008, 09:57 AM
IMADMAN IMADMAN is offline
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I think this is the 2nd. thread I have read that you made. I will say it again. Your use of highly detailed pics and detailed descriptions really make the thread enjoyable to read. You would'nt happen to be a magazine editor would you? Also what kind of camera are you using to take such clear photos?
Great job again!!!!
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Old 05-02-2008, 11:41 AM
oline897 oline897 is offline
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Thanks for taking the time for such a detailed write-up!
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Old 05-02-2008, 11:51 AM
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Thanks guys

IMADMAN,
Camera is Canon Ixus/Ixy 10mega pixels on macro setting - no flash.

No such luck re magazine editor - I'd be working with the models all day - unfortunately have to settle with working with 3d models instead.
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Old 05-02-2008, 11:55 AM
miketroll357 miketroll357 is offline
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Good post bro, lots of good info there.......
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