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Discussion Starter · #1 ·
I'm looking at the Jamis Dragonfly 26+. It has 26x3.0 tires on 27.5 rims. How does a 26 inch tire of any width measure out to 27.5 diameter? What am I missing here?

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A 27.5x3" tire measures out to a 29" diameter and a 26x3" tire measures out to a 27.5" diameter. Combining them with a 40mm rim, results in the ultimate combination of traction, roll-over and versatility without being too heavy, too bouncy, too tall or feeling lethargic on the trail.


https://www.jamisbikes.com/usa/dragonfly26pro.html
 

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I'm looking at the Jamis Dragonfly 26+. It has 26x3.0 tires on 27.5 rims. How does a 26 inch tire of any width measure out to 27.5 diameter? What am I missing here?

PLUS
A 27.5x3" tire measures out to a 29" diameter and a 26x3" tire measures out to a 27.5" diameter. Combining them with a 40mm rim, results in the ultimate combination of traction, roll-over and versatility without being too heavy, too bouncy, too tall or feeling lethargic on the trail.


https://www.jamisbikes.com/usa/dragonfly26pro.html
It can't have 26x3.0 on 27.5 rims. It's not possible.

I have this pic on my phone from long ago, ironically from Jamis.

It estimates effective rolling diameter to compare wheel sizes. There definitely some generalities made, but it's close enough for visuals.


Sent from my iPhone using Tapatalk
 

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135 Posts
Discussion Starter · #3 ·
It can't have 26x3.0 on 27.5 rims. It's not possible.

I have this pic on my phone from long ago, ironically from Jamis.

It estimates effective rolling diameter to compare wheel sizes. There definitely some generalities made, but it's close enough for visuals.


Sent from my iPhone using Tapatalk
Yeah, but even in the spec sheet it clearly lists a 26x3.0 tire and a 27.5 rim. Makes no sense at all.

https://www.jamisbikes.com/usa/17_pdf/17_dragonflypro.pdf

Wheels WTB Scraper i40 TCS tubeless 27.5" rims, Formula sealed bearing 15x110mm front & 12x148mm
rear 6-bolt disc hubs, stainless spokes

Tires WTB Ranger, 26 x 3.0", TCS tubeless
 
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