Mountain Bike Suspension Bushes Stainless Steel 1/2″ x 1/2″ (12.7mm x 12.7mm) – 6mm, 8mm and 10mm bore available. Manufactured by Profin Components.
- ****You absolutely need a DU bush tool to fit these, don’t attempt to press them in with a socket, you will split the poly bush – buy a tool here****
- Each kit contains 2 x spacers, 1 x low friction poly bushing and stainless steel mounting hardware. If you want to change the shock hardware in 2 x shock eyelets you will need to order 2 kits.
- Free U.K. shipping available on all orders above £8, Worldwide shipping available.
Made with tight tolerances and quality materials – stainless steel with acetal spacers. Every kit is supplied with a superior low friction polymer bush.
Numerous mountain bike suspension bushes are available on the market made from materials such as anodised aluminium, brass, steel and grade 5 titanium – our aim was to produce the hardest wearing kits at the most attractive price of any retailer.
All of the premium brands over the World choose either Stainless Steel, Titanium or hard Anodised Aluminium Alloy with industry giants Fox offering Stainless Steel in addition to their lower priced anodised alloy kits.
We made prototypes from all of the aforementioned materials and subjected them to months of real world testing with various riders around the U.K. Of course there is readily available data for all of those materials online for tensile strength, Rockwell Hardness, density and so forth but our concern as mountainbikers is the partial rotation backwards and forwards within the shock eyelet bushing and how well the material holds up before changes to the critical outside diameter are noted. The two class leaders in this department are 303 Stainless Steel followed by Grade 5 Titanium.
Titanium has a weight advantage over stainless steel but for perspective a 22mm x 8mm stainless bushing weighs 13g to 7.5g for a Grade 5 Titanium equivalent. However even though Titanium has a greater tensile strength it scratches and wears more quickly than Stainless Steel, we decided that a rider was unlikely to notice a 5.5g weight difference but they would notice when they had to change their hardware. We settled on Steel.
So if Stainless Steel is so great why isn’t everyone using it?
The only real issue with stainless steel is how difficult it is to machine. Even free machining 303 Stainless Steel is hard on tooling. Tool breakages and tool wear significantly add to production time and cost. Our tolerance on the outer diameter of our stainless steel parts is +/-0.005mm, extremely tight, to ensure that the part fits correctly in the eyelet bushing and is free to rotate without play. That kind of tolerance is difficult to maintain, even more so when working with stainless steel.
Investment to reduce the cost
The reason that our shock bushing kits are the most competitively priced on the market, despite being made of stainless steel is because we have invested heavily in machinery and process. We manufacture in quantities of thousands, not tens, this ensures that we have stock ready to dispatch and keeps the cost down for our customers.
Which width of MTB Shock Bushing should I buy?
You can either check the manufacturer’s tech sheets to see if they have published the size for your bike or preferably just measure them yourself with a vernier gauge, you won’t be able to get an accurate reading with a tape measure.
First measure the bolt diameter, it will be 6mm, 8mm or 10mm like so:
Then measure the width: