Up Close: S&M Mainline 2.425″ Tire

bmx trails dirt jumping dirtjumping

The 2.425″ S&M Mainline tire has been gathering quite a following in the woods lately. Though it’s touted as being front specific, I’ve seen plenty of people running them both front and rear. I wanted to get a closer look to check out just what S&M’s trail tire was all about, so I hit them up and they were kind enough to send one over for us to inspect.

S&M says that the 2.425″ size Mainline “is a nod to the old 2.125 Comp III we grew up riding in the front.” After mounting the tire up and taking a look down at it, I can see what they mean. Though the tires share absolutely nothing as far as tread pattern goes, they do have a similar fork filling look. With an inflated width of 60.7mm and a diameter of 532mm, the 2.425″ Mainline is one of the largest dirt tires on the market. Most modern forks will have plenty of clearance for this beast, but you may want want to break out a measuring device if you’re running and older set of forks to make sure that they’ll have room to accommodate the large girth of this tire.

Like I said earlier, I’ve also seen people running these in the rear. The same as with forks, most modern frames have been designed with room for larger tires, but you may want to double check first to make sure that your particular frame will have enough room to accommodate this one if you do choose to run it in the rear. Also make sure that there’s a little bit of room for some side to side action if your wheel gets knocked out of whack!

Now that we’ve gotten all of the sizing stuff out of the way, lets talk about the tread. Since the 2.425″ Mainline tire was originally designed to be a front specific trail tire, S&M put a lot of thought into how it would perform while railing around corners. They went with a raised micro-knurled tread pattern that features additional smooth raised angular lugs on the center and side treads to give you a little extra bite when you’re ripping through some berms. The tread pattern is aggressive enough to make you feel confident that you can push it and you’re not going to wash out, but without being overly knobby so that it feels you’re monster trucking.

S&M’s 2.425″ Mainline tire comes in both 20″ and 22″ sizes and weighs in at 26 and 29 ounces respectively. It’s rated up to 110 psi and is available with a traditional wire bead only. You can pick one up now from your favorite shop or mail order that carries S&M products! Click HERE if you need help locating one of those.



bmx trails dirt jumping dirtjumping


bmx trails dirt jumping dirtjumping