Yes they are sintered steel, one common reason for failure is that to remove or install them typically something is pried against the spoke. If it leaves an indents or marks that can provide a starting point for stress fractures. 5M pullies are commonly uses as they have round holes rather than spokes and are not susceptible to fracturing. Gordon on SF made a few utilizing an aftermarket CV which also added a bit of overdrive. our belts have a bit of a unique tooth profile so sourcing something is not the easiest.
Ok well i needed a Roo bar, rock sliders, snorkel, roof rack and really wanted some rollover protection as well so decided to tie it all together into something a bit stronger. Steered clear of the traditional exo cage shape in an attempt to draw less attention from the fuzz, but hoping this will still keep my gf and I somewhat safe in case of a rollover. The roof rack had to mount the roof top tent and still leave space to carry a 9' surfboard which is a bit of a bitch with limited roof space.
So i bought a shit load of tube and nek minut things got out of hand. This is my first attempt at any type of bar work so be gentle!!
Bought a crappy tube ebay spec tube bender/kinker that immediately went in the bin, then borrowed this beauty off a mate which does such a nice job by comparison
I already have an overqualified tube notcher:
Does a nice job also
Start of a roo bar:
Now with radiator/headlight hoops that i dont really like but oh well they'll do