Author Topic: Run WTB Trailblazer 27.5x2.8 on IP=036 frame?  (Read 2011 times)

gobears

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Run WTB Trailblazer 27.5x2.8 on IP=036 frame?
« on: November 11, 2015, 03:16:47 PM »
Hi All, 

Looking into the possibility of getting a 29er FS frame and running the WTB trailblazer 27.5x2.8 tires.
However, I am worried it may be too tight.
Anybody try it?

I think the right prototype would be a Trek Fuel EX, which has short chainstays and wider boost spacing for the 27.5 plus tires.
There are several name brand frames out there, but we are talking $3000+ for the frame alone.
So, I am thinking to get the 29er FS as a stopgap measure until official 27.5+ bikes are available from Peter or others.

Any thoughts?



cmh

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Re: Run WTB Trailblazer 27.5x2.8 on IP=036 frame?
« Reply #1 on: November 12, 2015, 08:31:18 AM »
Search on here, I don't recall what topic it was, but I remember photos of what I think were 650b+ tires on a full suspension bike, so the info is out there.

Also, I saw that Peter has 650b+ bikes available now but think they were all hardtails.

gobears

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Re: Run WTB Trailblazer 27.5x2.8 on IP=036 frame?
« Reply #2 on: November 16, 2015, 02:26:37 PM »
I've done quite alot of searching on line, and all I've come up with is that the IP-036 has about 73mm of spacing where at 27.5+ tire would need its clearance.  That is very, very tight.  Much tighter than my 2010 SJ FSR 29er, which i measured at about 82mm!

It seems that the cm-036, ip-036, fm-o36 frames have tighter chainstay spacing than most 29ers.

Bummer, unless somebody has a real setup to report, then I'll wait for a boost 148mm 29er FS carbon setup.


SportingGoods

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Re: Run WTB Trailblazer 27.5x2.8 on IP=036 frame?
« Reply #3 on: November 17, 2015, 09:26:07 AM »
73 mm is wide enough to fit a 2.8" tire on a 35 mm internal rim. That's what I get and love it.
It won't fit 3" tire. It won't fit 2.8" tire on >40 mm internal rim.

gobears

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Re: Run WTB Trailblazer 27.5x2.8 on IP=036 frame?
« Reply #4 on: November 17, 2015, 05:02:43 PM »
Ok, that sounds like it might be enough.
And, I got a confirmation from an IP-036 owner on another forum that 73mm is about what it is.

With so many 27.5+ commercial frames coming out with boost spacing, i think its only a matter of 6 months before we see a chiner.
I might just wait it out..

SportingGoods

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Re: Run WTB Trailblazer 27.5x2.8 on IP=036 frame?
« Reply #5 on: November 18, 2015, 03:45:06 PM »
That's definitely the best option. You'll get an optimized geometry then, with shorter chainstays thanks to the Boost.