The OPEN WI.DE as a Do-Every part Bike
That is the third bike I’ve offered during the last couple of weeks that spans a large use case vary. These are the bikes of the long run. This idea works for me as a result of my gravel and street positions have knowledgeable one another to the purpose the place it is the identical place.
I first grew to become conscious of the utility of bikes like this again in 2014, after I put street wheels on my new Litespeed gravel bike and located that it was each bit the equal of my devoted street bike. At present, enterprising bike makers make their bikes with this in thoughts.
At present it’s an OPEN WI.DE. It is a purpose-built gravel bike. However as we’ve seen right here with the Cervelo Caledonia and the OBED Boundary, when you design a motorbike that assumes a wheel radius of, say, 345mm, you could have a ready-made platform for each a street bike and a full-blown West Coast gravel bike. What you want on this case are 2 units of wheels, on this case CADEX 42mm street wheels in 700c, (slightly below) and my trusty ENVE G27 in 650b (within the photos instantly following).
Earlier than I am going additional I’ve to extol the advantage of the G27 wheel. It’s my on a regular basis gravel wheel on this bike, and I can not discover a strategy to get this wheel out of true or spherical and boy have I attempted (in the middle of my using). It’s acquired a Schwalbe G-One Bike in 53mm, identical as a 2.1” tire, and whereas this tire has a much less aggressive tread than the tires on my twin suspension mountain bike, it’s that width. This tire, on this wheel, on this bike, is a go-everywhere bike. And on this bike it’s ridden in its 650b dimension.
However that is the character of what I name West Coast gravel: rocky river washes, steep up and down, decomposed granite sand, and pavement. We’re both using on paved roads or we’re on MTB-worthy terrain. We don’t have good nation gravel roads in California. It’s most snug selecting the wheel and the gearing that solves the worst case components of my journey, therefore the usage of this wheel/tire.
Let’s discuss this for a second; possibly you all perceive this however possibly you don’t. Street and gravel bikes share a typical body platform that’s not shared by MTB frames, and I’m not speaking about suspension or some other MTB-specific function. Street and gravel share a typical crank and BB motif. You possibly can put a street crank on a gravel bike and vice versa. In truth, you would possibly say that SRAM has erased the strains between street and gravel. If you put these cranks on a body, the space from the pedal shoulder – the place the pedal meets the crank – to the centerline of the bike is roughly 75mm. it could possibly be as small a quantity as 72.5mm. If you double this, you get what’s generally referred to as Q Issue – one pedal shoulder to the opposite – and for Campy it’s tradionally been 145mm or so, and for Shimano between 145mm and 150mm.
Gravel preserves this dimension. The everyday distance from the pedal shoulder out to the center of the pedal is 53mm. So, you add 106mm to the Q Issue and also you get a Stance Width of between 250mm to 255mm. When using street, gravel or tri, that is the way you pedal.
MTB? No. The Q Issue is extra like 172mm or 175mm. Your pedals are pushed away from the body an additional centimeter and-a-quarter on every facet. Why are MTB bikes constructed wider? To accommodate for that fats rear tire. As that tire pushes out the chain stays (to make room for that tire) the crankset needed to be spaced out from the body, in order that the chain rings don’t contact the chain keep. Mainly, that drive facet chain keep is caught in a pincer: fats tire on the within, chain rings on the skin.
However that is one cause why you want your gravel bike – it rides and looks like your street bike. As mentioned after I confirmed you the OBED with 2 units of wheels, the magic to getting a motorbike that feels good no matter fats tire or skinny is that the wheel radius – from the hub axle to the bottom, must be the identical on each wheels. The tech that makes this attainable is disc brakes. This lets you select wheels of various sizes. You utilize 650b with the two.1” tires, and 700c wheels with 28mm or 30mm tires. Identical wheel radius on every.
On this case, the skinny-tired wheelset is a brand new set of CADEX wheels I simply acquired. These are 42mm deep and I can really journey these each as street or as gravel wheels. In that sense they’re considerably analogous to the Zipp 303 wheels I’ve been writing about, each the 303 S and the 303 Firecrest. All these wheels are straightwall (hookless bead) development, are for tubeless (and never tubeless-ready, these are tubeless interval), and are fairly fattish in interior bead width (23mm to 25mm), making them candidates for something between 25mm to 40mm tires.
However, once more, I don’t like this type of dual-use bike I’m writing about used with 700c wheels and 40mm tires. That’s a a lot taller wheel, and if the bike is geometrically designed round that 345mm wheel radius then as soon as you place a 700c wheel in there with 40mm+tires, that is possibly a 355mm radius and this adjustments the dynamics of this bike as regards steering and shoe overlap.
This OPEN WI.DE I am writing about in the present day introduces a brand new problem to the train that I didn’t must face after I wrote in regards to the Cervelo Caledonia or the OBED Boundary. These bikes had 2x drivetrains. The OBED has a GRX mechanical groupset on it; that is devoted gravel; 48×31 chainrings and 11-34 cassette. The smallest gear on that OBED, the 31×34, had a couple of 24.5” gear. That’s a pleasant small gear, good for the steep offroad hills we’ve got out right here in California the place I dwell. The Caledonia has a SRAM AXS 48×35 and an 10-36 gearbox, and the smallest gear is simply over 26”, nonetheless fairly small, and high-quality for that bike as that’s extra of a devoted street bike.
Can I make this OPEN WI.DE a dual-use bike? It’s acquired a SRAM AXS 1x on it, SRAM Eagle behind the crank and SRAM Drive eTap from the crank ahead. It’s acquired a 42-tooth chain ring on the bike and a 10-50 within the again. The small gear on that bike is a tiny 22.5” gear, however let me inform you generally even it isn’t tiny sufficient for the using I do on that bike. The big gear is 113.5”. Is that a big sufficient gear for you, when you configure this bike for street, with these CADEX wheels? The OBED has a 48×11 as the most important gear, and that may be a 118” gear. The OPEN’s tallest gear is about midway between the OBED’s 11-tooth and 12-tooth.
Nicely, heck, you would possibly simply put a much bigger chain ring on the OPEN, when you’ve got greater legs than I do, and also you want a much bigger gear on the excessive finish and also you don’t want that tiny gear on the low finish. Nicely… no. You possibly can’t. Keep in mind that stance width dialogue? That tighter street Q Issue pushed the crank nearer to the body, and that wheel clearance within the OPEN WI.DE – what that bike’s identified for – pushes the chain keep out. This implies a 42-tooth is the most important ring you possibly can placed on that body.
The OPEN WI.DE works very nicely as a one-bike-fits-all. After I put the camper on the truck and I take off for a number of days of using, it’s this bike with 2 wheelsets. Earlier than the shrewd amongst you point out this, sure, I’ve shot a pic of a motorbike that’s not really usable. The CADEX wheelset has a Shimano cassette on there. I’ve an XDR driver physique for this wheelset, in order that I can placed on an Eagle cassette, however I’ve misplaced my through axle finish caps and am awaiting a set.
Shimano and SRAM each lack sure gearing choices of their lineups, and SRAM’s lacking choice is, maybe, that 10-42 or thereabouts 12-speed cassette, for the street wheelset. That will give me 1:1 gearing (42×42) which might be low sufficient for the street using I’ll do on my getaway journeys. However that cassette would not exist but, to my data, and the 10-36 cassette would not supply me a decrease sufficient gear, so, even on my street wheel set-up, 10-50 it’s.
I don’t have a brand new 3T Exploro Racemax in my workshop, however I believe this is able to be a probably nice choice for every part between fats tire gravel and street race. It seems to be nearly a geometrical duplicate of the OBED Boundary I’ve acquired, which I simply wrote about. In fact the 3T has each the specified tire clearance and it’s constructed with aerodynamics in thoughts.
A couple of notes in closing. You would possibly wonder if the irreconcilable concern is the handlebar. When you select a gravel bar, and then you definately put your street wheels in your bike, how is that bar appropriate with devoted street bike using? I’ve come to view the gravel bar as the following street bar. You guys who gave me guff over disc brakes on tri bikes, and street tubeless, right here I’m being irksome once more. Let’s have a look at what street handlebars are going to seem like. I predict a narrowing of the hoods place; and a flare within the drops; and a last tube bend in order that the bars at their terminus are again to parallel with the bike. I’m fairly assured these new gravel bars made by 3T, Profile Design, Zipp which might be formed as I describe, shallow drop (110mm to 120mm), brief attain, are the template for what street bars are going to seem like. So, no battle for me!
I’ve acquired plenty of components I’m placing on these bikes I haven’t spoken of earlier than, like these CADEX wheels and tires. Sure, it is a Large-owned model. No, I haven’t written about them but. Nonetheless noodling them. What I’ll say is that this: My new first checks for tubeless are: Do the tires go on hands-only? Do they bead up with regular inflation pressures? And do they maintain air nicely in a single day earlier than I put any sealant in? CADEX thus far passes all my first-look checks. Extra on these later.