Maxxis Rekon 29×2.6″

29 01 2018

Yet another tyre size. Why oh why? whats the point? Blah blah blah.

I, for one, like all the different choices we now have in wheel and tyre sizes. You can really pick the one that works for you.

About 18 months ago, maybe longer, I built a front wheel for my trusty race bike – Maul – that could take advantage of 29+ tyres or fit a ‘wide trail’ tyre. I used an Enve fork so that offset could also be adjusted. I wanted to see how it all worked and figured the increased offset may work well with the bigger diameter wheel than the bike was designed for.

It was ok. The big tyre helped absorb some shock at the Wilderness 101, though I was still beaten up and with the release of the 29×3″ Minion series tyres, it gained preposterous front traction. To the stage where I had to replace the rear tyre with a Tomahawk, to get back some semblance of balance in terms of edge and cornering ability. Basically, with the Ikon I was using on the rear, or even the Ardent Race, the Minion wrote cheques the rear could not cash.

The geometry was always a little funky, though, and with the news of the Rekon 29×2.6″ I figured that would be the sweet spot. It would also drop over 300g from the front wheel and still be a reasonably absorbent and grippy front.

Well, I have a few hours on it now and its pretty good. It *is* light at sub 800g, but it doesn’t seem too fragile so far. The edge holds up and it certainly rolls fast.

I have 16 psi in it at present and doubt I want to go much lower.

It is in no way a plus tyre. That much is immediately obvious. The volume is just not great enough to make it behave in the way I have come to love with plus tyres in general.

The bike is back to its snappy, light, xc orientated ride and I’m happy about that.

As part of the project, I built a new Junglefox II 45mm internal rim onto a 100mm front hub. I have a notion to try the Minion DHF 29×3″ on the front of BA using an Enve fork. I feel that a ~50mm rim is ideal for true 3″ tyres. The bike is designed around a 120mm travel fork and normal 29×2.3″ wheel, so it might be just a wee bit steep at the front. We’ll see.

Interestingly, the build seemed much less tight than I am used to. Then it dawned on me that I hardly ever build with narrow OLD hubs any more! Still, 3x disk, 2x non, Sapim D lights and good balance and straightness should make for a decent wheel.



7 12 2016

Fast and furious. The development of new* tyre sizes that is, not so much the covering of ground!

It probably goes without saying that I have enjoyed several years of messing with 29+, 27.5+ (or B+), 26 fat, 26 fatter, 27.5 fat (B fat) and even 27.5 (B) fatter. There have even been some options appearing with the 27.5 fat, not that my love for the Bontrager Hodag is in any way diminished.

I have also spent some time messing with mixed wheel sizes. Typically a bigger rim diameter on the front than the rear or a bigger tyre volume on the front than the rear.

Is it time for any conclusions?


27.5×4.5 (the Bontrager Barbegazi – and recently released Gnarwhal) is the undisputed best in super soft conditions. The huge diameter and massive paw print is quite frankly remarkable. However, it is a HUGE wheel – over 770mm in diameter. This is bigger than 29+.

26 fat does an admirable job of not being too big, hefty or cumbersome but offering good floatation.

B fat (as I have become accustomed to calling the Hodag and the new Maxxis Minion DHF 27.5×3.8) makes an outstanding front tyre in combination with a 2.8 or full 3″ rear 27.5 tyre. These tyres both have insane traction, in crappy or dry conditions, but don’t add too much rolling resistance when paired with a faster rolling b+ rear tyre.

B fat as a rear tyre is tricky: both options are very knobbly tyres and as such, rolling resistance is relatively high. If this is not an issue, or indeed a bonus, fire away, with the same up front or even a Barbegazi.

29+ is the king of roll. The effect is more pronounced on the front than the rear, but there is no doubting a bigger diameter, relatively fast tread will cover (moderately rough) ground like nothing else. Special mention here must go to the Bontrager Chupacabra for being both light and seemingly durable. Not the most aggressive, but adequate.

29+ front 27.5+ rear appears (to me at least) to keep a lot of the benefits of the roll over of a f+r 29+ but – for an indefinable and physics-defying reason – feels a little more playful. about the only factor that can really make much of a difference given that some of my bikes will have the same stay length regardless of which diameter is in use, is the radius and therefore how the bike behaves over different amplitudes of hits. The bigger radius might also potentially change lean angle in cornering.

The more I read about this, the more confused I become. For starters, within the parameters of a bike, the weight of the rider far exceeds the bike and thus acceleration differences are likely to be negligible. Wheel stiffness and response are probably very, very small effects also.

The difference in gyroscopic force and moment of inertia between the sizes would seem to be too small to be detectable at the speeds we ride at (with the wheel weights we use) and the same would go for the difference in effect of acceleration with the torque that can be applied (see here for a nice, plain explanation of applying torque to a wheel and then consider the force a human can produce and the difference in wheel diameter/weight).

I have also always wondered if the gyroscopic force of a wheel *not* in line with the direction of travel affects how a bike feels (consider sitting in a rotating chair and holding a spinning wheel then twist this and you will spin around on the chair. Surely, when we tweak that move in mid air, the two wheels rotating affects your position in the air? and would a bigger wheel exert more force noticeably?

And what of B fat front? Can the added weight and girth be detrimental? particularly with the Hodag – which weighs little more than a robust 29er tyre – I believe not. The combo of low psi and ~745mm diameter (the same as a good size 29er) mean you get the low pressure smearing grip, the lack of knocks from impact and good roll over obstacles, too.

It makes normal 29ers feel like a ‘cross bike.

No doubt as more sizes become available, (I’m looking at you, 27.5×2.6) and more tread patterns are brought to market, I will refine my thoughts.

At present, B fat front/B+ rear or 29+ front/B+ rear is the best performing wheel combo for my riding.

*it all stems from the Gazzaloddi, right?