All mountain, plus.
The shifting tides towards beefier tires and bigger capability makes wheels like Ibis' 742 Carbon Fiber 27.5in Wheelset a welcome addition to the stable. Compared to its predecessor, the 741, the 742 drops some weight with a lowered rim height but still boasts the same titanic rim width. The combination offers increased impact resistance, reduced rotational weight, and a massive platform for plus-sized tires.
We've seen various names inhabiting the center of Ibis wheelsets in the past, and the 742 joins the latest trend in enduro wheel hub choice. Industry Nine gets the nod, and anyone who's spent time on that brand's meticulously CNC-machined freehubs will be nodding in agreement over that choice. The freehub features six offset pawls in a mechanism that cuts the engagement angle down to just three degrees, which translates to nearly instantaneous response out on the trail.
Compared to the 741 model it's effectively replacing, the 742 rim features a lower rim height, which has a negative correlation with impact resistance. The lower the rim, the better it weathers big hits, big drops, and surprise roll-overs without failing under you—basically, the 742 is designed to withstand even more enduro abuse. Given that Ibis' internal tests showed the outgoing 741 is between 50 and 300% stronger than competing models, we realize that pushing even further ahead in the durability game is an ambitious—and maybe even unnecessary—move. But that's just how Ibis rolls.
Despite the change in depth, the 742 still has the same 35mm internal width, which further buttresses the rim against the deprecations of the trail while allowing plus-sized tires to sit nice and fat. This increases air volume to decrease PSI and make for more plush traction across everything from root-latticed climbs to rain-slicked granite. The wide footprint is supplemented with a hookless bead that can be setup tubeless with a plain ol' floor pump and which decreases the risk of burping when you're wantonly throwing the bike into switchbacks during flowy singletrack loops.
- A plus-sized, lightweight, wheelset built for enduro shenanigans
- Oversized footprint takes full advantage of plus-sized tires
- Shallower rims reduce weight and increase impact resistance
- Hookless beads actually hold tubeless tires more securely
- Tough pre-preg epoxy adds durability
- American-made I9 freehub engages nearly instantaneously
- Q & A
- Familiarity: I've used it several times
Very nice. Exactly the kind of quality you would expect at this price. Removeable valve cores (I would say, "of course", but that's not always the case). Claimed weight is 1610, came in at 1600 on the nose. Takes centerlock discs, 6 bolt not available. I was told that the Torch hub was loud....not true....they are quieter than my DT Swiss 350 hubs with 18 and with 54 tooth engagement even after new grease. It's a quiet "angry bee" sound. I doubt anyone would find it objectionable. Riding over gravel is louder. If you spin one up in the shop it'll be louder than on the trail. I think once you put on a cassette and disc it dampens the sound down. The engagement is pretty near instantaneous as advertised. I have about a dozen rides on them with 2.6" Nobby Nics and with Rocket Rons. Both come in around 2.6-2.65" on these at 18 psi.
Something to consider when putting a tire on tubeless...The "groove inside the rim is offset. I found that, if you first put the tire on the side that is offset in and then move the bead out board, it gives you a better shot at getting that other side of the tire on by putting the bead in the groove...I'm not even sure that makes sense to me, but when you see the rim I think you'll know what I'm talking about.