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Mtn bike tire size

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Old 09-14-18, 09:13 AM
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glenncz
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Mtn bike tire size

I have a typical mtn bike that I don't use because I like the road. But I want to do some gravel/dirt road biking with it. The problem is it has these bigger mtn bike tires and i want smaller/lighter tires. The numbers on the wheel, are they for the tire only or do i need to know the size of the wheel? Any recommendations for a gravel/dirt road tire. I guess I need new tubes to go with the tire right?

note: i want to use the same wheels
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Old 09-14-18, 01:42 PM
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Kapusta
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Originally Posted by glenncz View Post
I have a typical mtn bike that I don't use because I like the road. But I want to do some gravel/dirt road biking with it. The problem is it has these bigger mtn bike tires and i want smaller/lighter tires. The numbers on the wheel, are they for the tire only or do i need to know the size of the wheel? Any recommendations for a gravel/dirt road tire. I guess I need new tubes to go with the tire right?

note: i want to use the same wheels
tell us what numbers are on the side of the tire.
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Old 09-14-18, 02:00 PM
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If it's an older mountain bike, it probably uses 26" tires, which have a bead seat diameter of 559mm. The designation on the sidewall will read "nn x 559" which is the width followed by the bead seat diameter. They're probably also marked "26x1.75" or something similar, where 26" is the rim size and the 1.75 is the width in inches.

Even a fairly wide MTB rim can take as narrow as 32mm/1.25". For some nice information, go to https://www.sheldonbrown.com/tire-sizing.html . The Sheldon Brown site is a wealth of bicycle information.
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Old 09-14-18, 02:03 PM
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If you have a 'typical mtn bike", (the typical bike being older) then there's a good chance you have 26" wheels. If so, then I've been real happy with these house-brand (Forte') tires from Performance.
https://www.performancebike.com/shop...26x175-50-1393
I've gotten great traction and wear, and lots of flat-free miles (and over 100 reviews that were overwhelmingly positive). At 1.75" wide, they feel pretty nimble on the road, yet still have plenty of bulk to shoot down a trail or dirt road.
Also, they're 35% off right now.
I also generally use my mtn bike as a road warrior, and after trying these tires for a while, I ordered several more to keep in reserve (and unfortunately, didn't get that great deal price.)
But, as Kapusta mentions above, you need to confirm what size wheels you have, to know what size tires and tubes to get.
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Old 09-14-18, 06:13 PM
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glenncz
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I should've looked at my tire before making this post but it's 26 x 2.1 to fit 575mm rim.
This is an instance where the LBS would be helpful but its' nice to figure things out for myself sometimes too.
I'm still mixed up but I'm going to order those performance tires. 26 x 1.75.
Will my old 26 x 2.1 probably fit?
I gave up mtn biking years ago for the road. But I have a lot of nice dirt forest roads around here. Since the dirt is a bit slower than the road, maybe it'll extend my season. Also, I'm an early bird and just got lights and since daylight is moving ahead, it would be safer to be on the dirt than on the road. And I kinda like how its' a little spooky riding alone in the dark woods waiting for daylight. (know the feeling from xc and running)

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Old 09-14-18, 06:35 PM
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You can probably fit anything from a 26 x 1.5 up to a 26 x 2.5 on it. (2.5 might be a bit of a 'squeeze' on an older MTB). If you just want a 26 x 2.0 or smaller just pick one up at your local bike shop. If you want to go bigger, such as a 26 x 2.5, take the bike into the bike shop to see if a tire that large will fit the fork and rear frame triangle.
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