When I was a freshman, I was given an amazing 26”(?) 2004 Jamis Durango Sport SX! (Pic 3) i rode it for years. It had some fat MAXXIS tires and a leather seat, I rode it every day until it got stolen February 22 2022.

I haven’t had a mountain bike since, but I figured I’d give it another try! I love hard tails, so when I saw this 29” 2015 Specialized Sirrus Sport! (Pic 1&2) I thought “I could work with that”. It was cheap, needed the tires aired up, and it would only shift through half the gears, I spent a half hour messing with the rear derailer and boom! Perfect bike! I just rode it a bit over 2 miles and I couldn’t be happier!

I love its lightness, and snappy steering, as well as its gearing as a 3×9. But I have a few things I’d like to do

I’d like to swap the solid front fork for a shock front end, to make it a hard tail, like my old Jamis, what’s a good brand of front fork that won’t break the bank, and preferably pull brakes not caliper.

And second, it has the original 700x32c tires, would it fit MAXXIS torch silkworm 29×2.10? They’re like the tires I had on my Jamis and I loved the performance.

by Coldlegos

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2 Comments

  1. That is 100% NOT the right bike for a MTB. It’s a 700c which is the same rim diameter as a 29, but you’re going to be severely limited on tire width. That bike is also 100% not built for jumping or the rough stuff an MTB goes through even on a green trail. If you decide to try it, I would recommend a good orthopedist and a good dentist be in your speed dial.

  2. Don’t want to rain on your parade but the Sirrius isn’t really a mountain bike, it’s a road hybrid. You might be able to put on a fork with a bit of suspension, but it would have to have mounts for caliper rim brakes. As for wider tires, your first limit is going to be the brakes – they may have room for 2.1, but they may not. I’d check the internal rim width too – those are probably road-oriented wheels, and may be too skinny to support mtb tires.

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