Rear bumper strengthening insert

Crazyj614 · Nov 14, 2011

I have searched and searched for the diameter (od) that ppl are using to slide inside of the carbon fiber rear bumper to add strength... As I am out of the country at the moment and new sled is on order.. I wanna also order some 6061 tubing that I'll cut down and add when I'm home! Also probably gonna cnc a bracket or two for gas cans... So if you have the tunnel measurements also, I could draw something up lol...

Thx,
J

skibreeze · Nov 14, 2011

The tube is 1 1/8"

Crazyj614 · Nov 14, 2011

skibreeze said:
The tube is 1 1/8"

Outstanding, thank you! What thickness are you using there?

skibreeze · Nov 14, 2011

skyler.hager · Nov 14, 2011

Do these have problems breaking!? Only thing I know is they are slick when you have wet gloves trying to pull em out!

Rudy198 · Nov 14, 2011

Crazyj614 said:
I have searched and searched for the diameter (od) that ppl are using to slide inside of the carbon fiber rear bumper to add strength... As I am out of the country at the moment and new sled is on order.. I wanna also order some 6061 tubing that I'll cut down and add when I'm home! Also probably gonna cnc a bracket or two for gas cans... So if you have the tunnel measurements also, I could draw something up lol...

Thx,
J

i can tell u that the tube is 16.5" long and the brackets are 3/8" thick,all i did was remove the carbon fiber and installed the same size aluminum in and powder coated it.Put the caps back on to finish it off.

Crazyj614 · Nov 15, 2011

skibreeze said:
.065

I think that I'm going to go a bit thinner with .058... Considering its just a reinforcement....

Thx,
J

Kleiny · Nov 15, 2011

skibreeze said:
.065

where did you get the pipe

skibreeze · Nov 15, 2011

Crazyj614 said:
I think that I'm going to go a bit thinner with .058... Considering its just a reinforcement....

Thx,
J

I have bent an aluminum tube WITH an aluminum insert. I'd go with the thicker tube.

extreme E said:
where did you get the pipe

I ordered it from onlinemetals.com

tyb57 · Nov 15, 2011

I was thinking about getting a pieace of aluminum tubing with all the same dimensions of the carbon fiber one, maybe a bit thicker, put some knurling on it for grip and then switching them. I've got to imagine any machine shop could do this for you relatively cheap. Any thoughts on this?

skibreeze · Nov 15, 2011

That's a good option as well. If I was going to spend any real money, I'd just buy an aftermarket bumper. The side pieces are the next weak link.

Crazyj614 · Nov 15, 2011

tyb57 said:
I was thinking about getting a pieace of aluminum tubing with all the same dimensions of the carbon fiber one, maybe a bit thicker, put some knurling on it for grip and then switching them. I've got to imagine any machine shop could do this for you relatively cheap. Any thoughts on this?

I had considered doing this, have access to a machine shop, or buying one for about 30 bucks... On another thread somewhere here... But I want the stock look so... Still going with 6061-T6

There are a number of places to get this stuff online... Some cheaper than others, only some carry the thicker stuff though..

http://www.onlinemetals.com/merchant.cfm?pid=6998&step=4&showunits=inches&id=71&top_cat=60

Crazyj614 · Nov 15, 2011

And another at a good price...

http://www.shapirosupply.com/index....id=268&zenid=4ad07504a2123f89f76f0328c1313e27

skyler.hager · Nov 15, 2011

How do y'all break the rear bumpers so easily? I've only broke one in like 5 sleds an that was a freak wheelie over accident haha

m8sandman · Nov 15, 2011

the 2 my buddies have broke were both from backing into trees. a piece of 1 1/4 outside diameter tube fits right in its place. you have to hog out the inside of the ends if you want the endcaps to fit...

Crazyj614 · Nov 16, 2011

skyler.hager said:
How do y'all break the rear bumpers so easily? I've only broke one in like 5 sleds an that was a freak wheelie over accident haha

Jacking on the center, jump landings etc... Better to reinforce than have to replace IMHO

J

Matte Murder · Nov 16, 2011

Holz makes a nice replacement tube. Black, knurled. Ready to go. Right around $40 if I remember correctly. Caps fit REALLY tight.

tlm700 · Nov 16, 2011

my choice

heres my choice of bumper upgrade,just got rid of my m-800 and think this was the only good feature of that sled, other than the track!! bought the bumper for $20.00 at the puyallup snow show.

rmk2112 · Dec 15, 2011

Matte Murder said:
Holz makes a nice replacement tube. Black, knurled. Ready to go. Right around $40 if I remember correctly. Caps fit REALLY tight.

Looks like a great replacement!

http://www.holzracingproducts.com/s...age=product_info&cPath=22_67&products_id=1075

GREICO1 · Dec 16, 2011

Call JT Sports in Montana. he has replacement bumpers and inserts to fit the carbon tube on the pro. $20-$35.

jtpanels.com

Rear bumper strengthening insert

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