The brand new Issue Ostro Gravel isn’t the model’s first foray away from asphalt. It already has what it calls a gravel racing bike (a title that, one assumes, carries over to the Ostro) within the LS mannequin, and the Vista, which is extra of an endurance highway bike with some gravel functionality.
Taking the model title do every thing, an aero highway bike and sticking ‘gravel’ on it provides you some clues to the said goals of the brand new Ostro Gravel; Velocity, win gravel races, and finally some extra velocity. Gravel racing appears to be right here to remain, and this can be a gravel racing bike with its eyes firmly set on the highest step of the rostrum.
The legality of the UCI
The little UCI sticker hidden on the high of the seatube on each UCI authorized bike is one thing simply missed, and till lately was one thing that wasn’t very mandatory for bike firms to think about when constructing a gravel bike. Now although, with the UCI sanctioning gravel racing it’s a prerequisite for participation, and given the LS issue just isn’t UCI authorized if the model wished to compete they must both re-engineer the LS or construct a brand new bike, and clearly they selected the second possibility, its the LS as extra of It left a mannequin of every thing compared.
Whereas low weight has taken a again seat to improved aero in recent times, having a sub-kilogram weight to border is certainly up there with the most effective gravel racing bikes. It additionally signifies that there’s little extra reserve carbon to hold cargo; There isn’t any fork boss, however there are two units of bolt high tube bento containers on and on the downtube for what Issue described as an ‘E.coli catcher’, or a 3rd bottle for you and me.
Whereas 900g is feathery to the gravel body (within the ‘Bare Grunge’ paint possibility – principally crude with some splashes), there’s nonetheless sufficient materials to sculpt the tube into the prerequisite aero improved form, and the OSTRO VAM DNA is fairly clear to see, constructing What Issue claims as ‘class main aerodynamics’. The headtube is especially deep, wanting extra like the most effective aero highway bikes than those that meet the tough stuff, with the standard truncated aerofoils on the downtube and seatube too. It stopped wanting a hinge-based headtube, as a substitute choosing a spherical steering wheel and a extra customary headset for robustness, with an aero-improved spacer stack to offset any rounded entrance edges.
Horrible tire measurement and wheel floppy
With the often slacker head angle and better monitor numbers that often distinguish gravel bikes from their highway counterparts the entrance wheel can flop at low speeds. It’s nice for extra sketchy descents, however performs helpful on slower climbs. With this in thoughts Issue has chosen a barely larger than ‘regular’ head angle of 71.2-72.3 levels, relying on measurement, with two offsets for the fork additionally relying on measurement. The goal is to maintain the entrance finish tremendous snappy when utilizing the utmost 43mm tire measurement.
This additionally has the compound profit of making a dealing with bundle extra akin to an endurance highway bike, one thing Issue is eager to advertise as a transparent secondary use case for the Ostro Gravel.
Black Inc. ending package
A best-in-class aero frameset is one factor, however with out the proper construct it should nonetheless be hamstrung. Native part model Issue Black Inc. is caring for the proceedings, offering a brand new wheelset, the Thirty-4, which is optimized for wheels bigger than 30mm. Shieldless, with hubs fitted with Ceramicspeed bearings we assume an inner width across the 22mm mark, however this hasn’t been confirmed but.
A brand new, light-weight built-in bar-stem combo can be fitted, and options inner rails for the brake hose, in addition to PC mounts primarily based on the Go-Professional mounting system to raised deal with the added load of issues like bike lights and motion cameras typically beneath They cling on a pc. Given its efficiency aspirations it’s not stunning to see the Ostro Gravel Issue electronics solely, and saying it’s additionally disc simply sort of goes with out saying at this level.
Construct and pricing choices
Issue Ostro Gravel is accessible within the aforementioned Bare Grunge, or the marginally heavier White Grunge, and in a collection of artificial and semi-synthetic choices.
The frameset is accessible, together with a fork, setpost, bar-stem, Ceramicspeed T47A BB and Ceramicspeed Headset, for £4,730/$5,499/€5,450, whereas a rolling chassis possibility is accessible as a body however with Black Inc. headset. Thirty-4 wheels for £6,450/$7,499/€7,430.
The complete construct can be out there in SRAM similar to this:
- pressure $8,599/€8,520/£7,400
- Energy on a energy scale $8,799/€8,720/£7,570
- Crossing the XPLR with an influence meter $8,199/€8,120/£7,060
- crimson $10,499/€10,400/£9,030
- Crimson with an electrical energy meter $10,899/€10,800/£9,380
- Crimson XPLR with energy meter $9,799/€9,710/£8,430