drjon on his blog has a few good write-ups on 27.5+ tyres, there’s also the 27.5+/29+ thread on mtbr

Apologies ….. Read the title as widths 😳

Panaracer FatBNimbles are 695g on my scales.
Sorry, but I didn’t weigh the Nobby Nic 3.0 before I fitted it 😳

My wheels are Pro2 Boost, DT Rev spokes and Scraper i45 rims. Front weighs 1106g, rear weighs 1230g

I’ve just weighed a spare 27.5 x 3″ Nobby Nic EVO TLE (tubeless easy/snakeskin) in Trailstar compound and it weighs 904 grams

NN 3.0 Pacestar Snakeskin – 805g
NN 2.8 Pacestar Snakeskin – 850g

The 3.0 number is correct, I double checked it and the tyre is alot thinner build than the 2.8

Did someone mention Boost?

[video]https://youtu.be/hhpjZxHZa5Y?t=25s[/video]

I wouldn’t worry too much about that. The best 29er wheelset I have is also the heaviest, well over 2kg. Rolling resistance and grip can drastically change how a wheel/bike behaves so weight isn’t the most important part of wheel performance. It just affects acceleration which is easily felt, but a light wheel also decelerates easier. The right kind of heavier wheel maintains momentum more easily once up to speed, or feel like they encourage more ‘flow’, as long as the weight is adding rim+tyre width, the tyres are run at a suitable pressure and the wheels actually suit the terrain. It’s sort of a stop-start-stop-start feel of light weenie wheels vs the ability to maintain a speed once you’ve built it up and earned it of good heavier wheels.

20 psi. Followed the dirt recommendation where they were faffing around with the specialized enduro (albeit they were using 2.8s) as the rider weight is close to being the same as is the intended use albeit I’m waaay behind in skill set. Either way though, certainly not a silly low pressure.

There was a good article on NSMB with the Specialized fattie with two contrasting opinions of the plus wheels. I’m not convinced by the wheels to be honest, still trying them out but gut feeling tells me I prefer my 29er wheels with 2.3 aggressive rubber.

Just noticed I made a mistake up there – it’s Comps, not Revs I used.

Plus is bascially a con… if you believe its anything like a proper 29er size. If you just want a big ass tyre its pretty cool.

Running in a Zero AM.

I’m enjoying B+ on my Solaris but that’s probably at least partly due to the fact that the BB was a bit high for my liking with 120mm forks anyway.

What bothers me is that we seem to be heading for a phase of manufacturers offering 29/27.5+ bikes. How’s that supposed to work then? Unless there is some sort of geometry changing chip the BB will either be higher than optimum for the 29er or too low for the 27.5+ My guess is that they’ll go for the latter then we’ll have to put up with journalists raving about how much better the bike feels with the 27.5+ wheels.

Some bikes have adaptable dropouts to handle the BB drop (Trek?)

I’m happy with a high BB for my riding so designed my Pact with 29 in mind, dropping a little to B+ (but using some of the biggest B+ tyres)

If you are running a 2.4″ 29er and switch to 2.8 Trailblazers you’ll be dropping a lot more than 7mm.

I guess some folk will actually prefer the lower BB though.

About a 17.5mm drop would be more like it!

Yes and no. If you run the 2.8s at ‘normal’ pressures they are very normal tyres – drop them to 10PSI and suddenly they start making more sense as you get something that you don’t on a normal tyre. Ive never pinched one at 10 which of course would be impossible on a 2.3/4, and I don’t feel that they are particularly squirmy. They are however slow as **** on roads/firetrails (I run Pacestar to compensate a little but its still like driving a tractor on the road) and I think the tread could do with a bit more bite, but they are good in many ways. I like.

How much do you weigh Ben? I appreciate I’m not the most graceful rider but I’d be smacking rims left, right and centre at 10psi on plus wheels.

Pretty much endorsed by Cotic albeit I don’t blame him from trying to make a few extra quid selling the frame as b+ with an i29 rim on the rear.

As I said, it’ll suit some folks riding (aren’t low BB’s the new fashion anyway?). I just think folk should be well informed before jumping in.

To be fair, I think their testing showed that the frame could handle the 45mm scraper rims OK, they just felt that i29 rear and i35 front worked a bit better. It’s all on their blog somewhere I think.