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27.5+ Frame Compatibility Thread. Post your setup!

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#62 ·
I put a trail blazer 2.8 in the back of a lapierre zesty 29 and the zesty 650. I had it on a normal oem mavic 319 rim. Plenty of room in both frames. A proper 50 mm rim may change that but I still think it would be fine. Compared the 2.8 trail blazer to a vigalante 29x 2.3 and a mountain King 27.5x 2.4. The 2.8 in a similar width rim doesn't really appear to be much fatter. The plus size tire is slightly smaller diameter then the 29er and only a smidge taller then the standard 27.5. I'll be more impressed with a purpose built bike that can handle a 3.0-3.25 width
 
Discussion starter · #63 ·
Tracer650 said:
I put a trail blazer 2.8 in the back of a lapierre zesty 29 and the zesty 650. I had it on a normal oem mavic 319 rim. Plenty of room in both frames. A proper 50 mm rim may change that but I still think it would be fine. Compared the 2.8 trail blazer to a vigalante 29x 2.3 and a mountain King 27.5x 2.4. The 2.8 in a similar width rim doesn't really appear to be much fatter. The plus size tire is slightly smaller diameter then the 29er and only a smidge taller then the standard 27.5. I'll be more impressed with a purpose built bike that can handle a 3.0-3.25 width
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A trailblazer on a 19mm rim will not do any justice for you or for the tire. WTB recommends a minimum of 25mm internal width for the TB tires. That's also where you start seeing the benefits. Throw a 30mm internal rim on there and your impressions will change.

The TB comes into its own on wider rims
 
#64 ·
dustyduke22 said:
A trailblazer on a 19mm rim will not do any justice for you or for the tire. WTB recommends a minimum of 25mm internal width for the TB tires. That's also where you start seeing the benefits. Throw a 30mm internal rim on there and your impressions will change.

The TB comes into its own on wider rims
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Yes I fully understand that however for conversion bikes if you have to have a b plus swap at least people will know they can use it with a regular rim and get similar profile to standard aggressive all mountain type tires. I still don't think it's going to gain any extra height maybe a bit more width. I may have missed it but is there a photo of a caliper measuring the 2.8 on a 35mm rim?
 
Discussion starter · #65 ·
Tracer650 said:
Yes I fully understand that however for conversion bikes if you have to have a b plus swap at least people will know they can use it with a regular rim and get similar profile to standard aggressive all mountain type tires. I still don't think it's going to gain any extra height maybe a bit more width. I may have missed it but is there a photo of a caliper measuring the 2.8 on a 35mm rim?
Click to expand...
2.8 on a 45mm rim yes. Not a 35mm
 
#69 ·
Saw a dude on the trail today who had a Salsa Fargo set up B+ with Hugos and 2.8 Trailblazers. Plenty of clearance there, MAYBE able to go wider. I didn't have a camera with me at the time, so no pics.
 
#72 ·
Fat B Nimble 9

Gen 1 Nimble 9 with FBNs on Velocity P35s front and back. Clearance is pretty minimal on both the fork and frame, but I haven't had any rubbing issues so far. I don't have a gauge that reads well at low pressure, but my best guess is I'm running them between 20 and 25 PSI. Tires have around 60 miles on them and have been inflated for over a month, so I don't think they'll grow much more.

Pedal strikes have been an issue, but I think most of that is because my fork is set at 100mm. I just outfitted it with Crampons on 165mm cranks. I think that should solve most of the problems, but I plan to set the fork at 120mm to raise the BB a little more and slacken the front end.



 
#75 ·
Titus Fireline EVO

Setup my Titus Fireline EVO with WTB Trailblazer 2.8's on Derby carbon hoops. Plenty of clearance. Thinking I might try out a 3.0 next.

 
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Discussion starter · #77 ·
mothertruckinsteve said:
Gen 1 Nimble 9 with FBNs on Velocity P35s front and back. Clearance is pretty minimal on both the fork and frame, but I haven't had any rubbing issues so far. I don't have a gauge that reads well at low pressure, but my best guess is I'm running them between 20 and 25 PSI. Tires have around 60 miles on them and have been inflated for over a month, so I don't think they'll grow much more.
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For me an other B+ Yelli's I have seen, folks are generally running a 140 or 150mm fork. I can imagine that with a 100mm fork, you are going to run into some problems. I don't hit my cranks any more often than I did when it was set up as a 29er.

If you have the funds, a 140mm fork puts even a bigger smile on your face :)
 
#78 ·
dustyduke22 said:
For me an other B+ Yelli's I have seen, folks are generally running a 140 or 150mm fork. I can imagine that with a 100mm fork, you are going to run into some problems. I don't hit my cranks any more often than I did when it was set up as a 29er.

If you have the funds, a 140mm fork puts even a bigger smile on your face :)
Click to expand...
Yeah, 140 would be ideal, but they're pretty scarce with straight steerers and then I might have tire clearance issues. I'll do it if I've still got issues after converting to 120 but I'd like to save that new fork money to blow on another bike.
 
#79 ·
Niner RIP9 build and ride report

2011 Niner RIP9 v2 alloy, 142 rear conversion
X-Fusion Trace fork, 130mm
Roval Fattie 27.5 wheels, 29mm internal
Fat B Nimble tires

There is about 3mm of clearance all around with FBNs. The critical fit issue was chain contact with the tire in the lowest gear. The wheel needed truing; the rub was only on part of the rotation. I was able to eliminate the rub by doing an amateur true with a tiny bias toward the non-drive side.

I was a little surprised at this issue since the hub is supposedly a 142+, which, as I understand it, should move the cassette out 2mm relative to a normal hub. I was expecting to have to monkey with it to get it to fit, but it fit this frame just fine. However, the crank is a triple (2 rings+bash), so maybe that's why there was initially chain contact.

I couldn't get tubeless to work at first, so my first ride was with tubes at 25psi. It didn't feel or perform differently to a normal 29 setup to any significant extent, so I started to wonder what the fuss was about.

After a couple days, I tried tubeless again. This time it worked. The trick is to only detach one side of the tire from the rim and lever it out so as to be able to remove the tube and insert the tubeless stem and sealant.

I rode at 20psi and could tell a difference but still wasn't blown away.

Yesterday, I climbed at this same pressure but released some air at the top. Wow, what a difference! Incredibly smooth and plush descent, great traction, and over some pretty good chunk too. When I got home I measured about 12psi. I think I'll try a couple pounds more next time for similar terrain; I was a little worried about smashing the tire all the way to the rim on some hits.

I wondered if squirm would be a problem with the 29mm rim, but I didn't notice any.

There were some unavoidable muddy spots, including some nazty grey clay, on the previous ride, but there weren't any problems with it accumulating in the tight spots.

I am definitely sold on B+!
 

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