[tjamscad]

Is this what you are looking for?

 

[trapperK2]

Fork size

"WTB Scraper i45 rim with the TrailBlazer 2.8 tires on my Canfield Yelli Screamy."

View attachment 971586

Maybe a stupid question but is that a 29er fork or 27.5? thanks!

 

[mothertruckinsteve]

Is this what you are looking for?

You've got the right idea but you need to make sure that you're making this measurement 30-31cm from the rear axle as this is where a 27.5+ tire will be at its greatest width. You'll probably need to remove the rear wheel to make this measurement in the correct location.

 

[dustyduke22]

You've got the right idea but you need to make sure that you're making this measurement 30-31cm from the rear axle as this is where a 27.5+ tire will be at its greatest width. You'll probably need to remove the rear wheel to make this measurement in the correct location.

I went home and double checked my measures and must admit that my current setup has the widest spot of the tire at 33cm from the center of the axle. It's a Nobby Nic 2.8 on a i36 rim. Others I have measures are different than this. To be safe, measure between 31 and 33cm from the center of the axle to get your measurement.

On my bike the chainstay distance is no different at 31 vs 33cm, but other bikes might be.

Sorry for any confusion.

Sent from my SPH-L720T using Tapatalk

 

[Chowder Head]

How wide is you NN 2.8 at the widest?

 

[wjphillips]

I see. So now that you know it's 33cm at its widest spot on the tire, now you can measure the width across the seatstay and chainstay at 33cm from the dropout. And it should be minimum of 90mm (80 for tire width +5 on both sides for mud clearance)

 

[dustyduke22]

I see. So now that you know it's 33cm at its widest spot on the tire, now you can measure the width across the seatstay and chainstay at 33cm from the dropout. And it should be minimum of 90mm (80 for tire width +5 on both sides for mud clearance)

Mine is 80mm and is just fine on clearance. 90mm is a little extreme for a minimum.

My NN is 2.7 I believe at its widest.

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[Guest]

Mine is 80mm and is just fine on clearance. 90mm is a little extreme for a minimum.

My NN is 2.7 I believe at its widest.

yea 80 is plenty with a i35mm rim. The 2.8 NN will fit my heckler just right where the tire lives.

 

[wjphillips]

Perfect! Thanks guys, now I can go measure up a few frames. The OP is on to something with that marlin frame. I've seen those frames on eBay for $100 (or less). If the + tires fit, could make for a fun and cheap project to play around with.

On facebook, I saw a guy mount NN 2.8 to a 2008 gary fisher paragon 29er (those are cheap too)

It'd be nice to have a sticky thread in this forum which contains a table listing 29er frames with the necessary measurements and a list of rim/tire combos that worked for that particular frame. It's nice to know that some of these frames are not too expensive either.

 

[costaorange]

Chumba Stella 27.5+

Schwalbe NN 2.8 Front
WTB Trail Blazer 2.8 Rear
Easton Arc 30 Rim

 

[Guest]

Schwalbe NN 2.8 Front
WTB Trail Blazer 2.8 Rear
Easton Arc 30 Rim

Nice ride,what have you found to be good PSI settings??

 

[costaorange]

Nice ride,what have you found to be good PSI settings??

Haven't found the perfect psi yet but so far...
19 Rear
16 Front

 

[tjamscad]

You've got the right idea but you need to make sure that you're making this measurement 30-31cm from the rear axle as this is where a 27.5+ tire will be at its greatest width. You'll probably need to remove the rear wheel to make this measurement in the correct location.

Man this measurement thing is difficult. You are saying that from the center drop out 30-31cm down the chain stay and seat stay I measure the width at that point across the frame?

 

[dustyduke22]

Man this measurement thing is difficult. You are saying that from the center drop out 30-31cm down the chain stay and seat stay I measure the width at that point across the frame?

That is correct. But to be safe, i would measure between 31 and 33cm from the center of the dropout to account for different tires.

 

[dustyduke22]

"WTB Scraper i45 rim with the TrailBlazer 2.8 tires on my Canfield Yelli Screamy."

View attachment 971586

Maybe a stupid question but is that a 29er fork or 27.5? thanks!

Its a 29er fork

 

[NH Mtbiker]

Mine is 80mm and is just fine on clearance. 90mm is a little extreme for a minimum.

My NN is 2.7 I believe at its widest.

Sent from my SPH-L720T using Tapatalk

I've only got 76.5mm between the stays on my project bike. Is 2-3mm on either side of the NN 2.8 enough for non-mud riding?

 

[dustyduke22]

I've only got 76.5mm between the stays on my project bike. Is 2-3mm on either side of the NN 2.8 enough for non-mud riding?

That's close. Perhaps if you used i30 rims

Sent from my SPH-L720T using Tapatalk

 

[NH Mtbiker]

That's close. Perhaps if you used i30 rims

Sent from my SPH-L720T using Tapatalk

That is the plan exactly...i30 carbon rim in the rear and also an i30 29er carbon front rim. Yep....moto or mixer is the plan.

Free Shipping 1pc 650B Carbon MTB Rim 35mm Width | eBay

 

[Windigo]

So wanted to get the PonyRustler but all sold out.
Got a crazy good deal on a Horsethief today and would like to go 27Plus on it.

Lots of room between the forks but not as much in the back.
Could I go wider in front? like 3.0 and 2.8 in the rear?

It has 29er 2.35 NN from Salsa, need to find my calipers.

 

[12snap]

So wanted to get the PonyRustler but all sold out.
Got a crazy good deal on a Horsethief today and would like to go 27Plus on it.

Lots of room between the forks but not as much in the back.
Could I go wider in front? like 3.0 and 2.8 in the rear?

It has 29er 2.35 NN from Salsa, need to find my calipers.

View attachment 1060449

A WTB Trailblazer 2.8 will fit in that Horsethief rear triangle on a Velocity Blunt 35 rim. A Nobby Nic 2.8 on the same rim will not.