Wilier Jaroon

About the Wilier Jaroon

The Wilier Jaroon is a steel gravel bike that puts versatility front and centre. Built around a double-butted chromoly frame with Wilier's signature internal welding - where the joints are hidden inside the tubes for a seamless, uncluttered look - it's a machine designed to handle everything from tarmac commutes to rutted byways and multi-day bikepacking trips. The frame accepts tyres up to 42mm wide, and there's a forest of mounts for racks, mudguards, and multiple bottle cages. You're looking at a bike that doesn't force you to choose between road manners and off-road capability; it simply does both, with a bias towards comfort and durability over outright speed.

Steel frames have a reputation for soaking up road chatter, and the Jaroon leans into that with a slender 27.2mm seatpost that adds another layer of compliance. Yet the ride character isn't quite the plush, springy feel some expect from chromoly. The frame is surprisingly stiff - more so than many classic steel tourers - which translates to efficient power transfer but less of that languid, forgiving flex. It's a trade-off that suits riders who want steel's longevity and repairability without sacrificing responsiveness when you're pushing hard on gravel climbs or chasing mates along a fire road. The geometry is relaxed enough to keep you stable when the surface turns loose or corrugated, but not so slack that it feels ponderous on tarmac.

Modern standards underpin the package: thru-axles front and rear (12mm × 100mm up front, 12mm × 142mm at the back), flat-mount hydraulic disc brakes, and a tapered head tube. The Jaroon isn't chasing grams - complete bikes typically land around 10.4 to 11kg depending on build - but it's not a boat anchor either. What you get is a dependable, go-anywhere platform that'll still be rideable in a decade, with the kind of classic round-tube aesthetic that ages well and the practical touches that make long days in the saddle less of a chore.

Wilier Jaroon geometry

The Jaroon's geometry is pitched squarely at stability and all-day comfort rather than razor-sharp handling. Head and seat tube angles sit at 70 and 74 degrees respectively across the size range, which is relaxed by modern gravel standards. That slacker front end lengthens the wheelbase - over a metre even on the smaller sizes - and pushes the front contact patch further forward, so the bike tracks predictably through ruts and holds its line when you're descending loose gravel or navigating off-camber sections. You won't flick it through tight switchbacks with the same ease as a shorter, steeper race bike, but that's not what it's built for.

Reach and stack grow steadily as you move up the sizes, but the proportions keep you in a relatively upright position compared to a road race bike. That means less weight on your hands, which is a blessing when you're spending hours on rough surfaces or loaded up with bikepacking gear. The longer wheelbase also means the bike feels planted rather than twitchy, and the consistent 440mm chainstays across all sizes keep the rear end responsive enough for climbing without making the bike feel stretched out. Bottom bracket drop is a moderate 70mm, so you've got decent ground clearance for pedalling through technical sections without clipping rocks, but you're not perched so high that the bike feels tippy.

When you're seated and grinding up a long gravel climb, the geometry keeps your weight centred and your pedal stroke efficient. Stand up and the bike responds without feeling sluggish, though it's never going to dance like a lightweight race machine. On descents, the longer front centre and relaxed head angle mean you can let go of the brakes and trust the bike to stay composed, even when the surface gets choppy or you're carrying speed into a corner. It's a geometry that rewards commitment and suits riders who value predictability over playfulness.

Component choices & upgrades

The Jaroon typically arrives with Shimano GRX groupsets - either 1×11, 1×12, or 2×10 configurations depending on the build - and these are well-suited to the bike's character. GRX is Shimano's gravel-specific line, with clutch rear derailleurs that keep the chain quiet on rough ground and hydraulic disc brakes that offer consistent, powerful stopping in all conditions. Common gearing includes a 40-tooth chainring paired with an 11-42 or 10-45 cassette, which gives you enough range for steep gravel climbs without leaving you spinning out on fast descents or tarmac sections. If you're planning loaded tours or tackling particularly hilly terrain, you might want a smaller chainring or a wider-range cassette, but the stock ratios are sensible for most mixed-surface riding.

Wheels and tyres are where many riders look to upgrade first. Stock wheels are typically alloy rims on thru-axle hubs - solid and reliable, but not especially light or wide. If you're serious about gravel performance, a set of tubeless-ready rims with a 21 or 23mm internal width will let you run lower pressures for better traction and comfort without the pinch-flat risk. Tyres often come as 35 or 40mm options - Kenda Happy Medium or Panaracer Gravelking SK are common - and while they're decent all-rounders, you can tailor the ride significantly by swapping to something faster-rolling for road-biased routes or knobbier for loose, technical terrain. The frame clears 42mm, so you've got room to experiment.

The cockpit is functional rather than fancy: Promax alloy bars with a 12 to 16-degree flare, a matching stem, and a basic saddle. The flared drops are a smart choice for gravel, giving you extra control and leverage on rough descents, but if you're spending serious time in the saddle you'll likely want to upgrade the saddle to something that suits your sit bones and riding style. The 27.2mm alloy seatpost is a keeper - it adds compliance and is easy to replace if you want to experiment with setback or a suspension post for even more comfort. Beyond that, the stock build is well-sorted enough that you can ride it as-is and only upgrade when your skills, terrain, or ambitions demand more.

Where the Wilier Jaroon excels

The Jaroon is outstanding on long, mixed-terrain rides where comfort and versatility matter more than outright speed. If your typical weekend involves stringing together tarmac lanes, gravel byways, and the odd stretch of rutted bridleway - perhaps with a café stop or a wild camp in the middle - this bike will handle it all without complaint. The steel frame and compliant seatpost smooth out the worst of the chatter, the stable geometry keeps you confident when the surface turns loose or technical, and the generous tyre clearance means you can fit rubber that suits the conditions. It's also a natural for bikepacking and light touring: the rack and mudguard mounts are plentiful, the frame is tough enough to handle loaded weight, and the relaxed geometry won't punish you after a week in the saddle.

It does well on gravel climbs, too, especially with the wide-range cassettes that come on most builds. The bike's weight - around 10.5kg complete - means it's not the fastest up steep pitches, but the geometry keeps your weight centred and the gearing gives you enough low-end to spin comfortably even when you're tired or carrying gear. Descending is where the Jaroon really shines: the long wheelbase and slack head angle make it stable and predictable, so you can commit to corners and let the bike run without feeling like it's going to swap ends on you. The flared bars give you plenty of leverage, and the hydraulic discs haul you down reliably even in the wet.

Where it's less ideal is on fast, smooth tarmac or in situations where weight and agility are paramount. The Jaroon isn't slow on the road, but it's not a race bike - you'll feel the extra kilos on long climbs, and the relaxed geometry means it doesn't respond to quick direction changes with the same snap as a shorter, steeper machine. If your riding is mostly paved sportives or you're chasing Strava times on every segment, there are lighter, more road-focused options. Likewise, if you're planning serious singletrack or technical mountain bike trails, the rigid fork and gravel geometry will hold you back compared to a proper mountain bike. But for the vast middle ground - exploring, adventuring, commuting, touring - the Jaroon is a dependable, comfortable, and thoroughly capable companion.

Wilier Jaroon FAQs

What is the maximum tyre size for a Wilier Jaroon?
The steel-framed Jaroon clears tyres up to 42mm wide on 700c rims, which is generous enough for most gravel and light trail riding. Some aluminium variants are listed with clearance up to 45mm, and the discontinued Jaroon Plus model could fit 29+ tyres up to three inches wide. If you're planning to run wider rubber, check the specific frame variant you're considering.

Is the Wilier Jaroon a good bike for bikepacking?
Yes, it's an excellent choice for bikepacking. The frame has multiple mounts for racks, mudguards, and bottle cages, so you can carry plenty of gear without resorting to frame bags alone. The steel construction is durable and repairable, the geometry is stable under load, and the wide tyre clearance lets you fit rubber that'll handle varied terrain. It's built for long days and rough surfaces, which is exactly what bikepacking demands.

What kind of terrain is the Wilier Jaroon best suited for?
The Jaroon excels on mixed terrain: gravel byways, unpaved lanes, light trails, and tarmac sections strung together. It's stable and comfortable on rough, loose, or corrugated surfaces, and the wide tyre clearance means you can tailor the ride to the conditions. It's less suited to technical singletrack or fast road racing, but for exploring and adventure riding it's hard to fault.

Can you put fenders and racks on a Wilier Jaroon?
Absolutely. The frame has dedicated mounts for both front and rear mudguards and racks, making it straightforward to set up for commuting, touring, or all-weather riding. The generous tyre clearance means you can still fit wide rubber even with mudguards in place, which is a bonus if you're riding year-round.

What is the frame material of the Wilier Jaroon?
Most Jaroon models use a double-butted chromoly steel frame, which offers a balance of durability, compliance, and classic ride feel. Wilier uses an internal welding technique that hides the joints inside the tubes for a clean, seamless look. Some variants are listed with aluminium frames, so check the specific model if frame material is a priority for you.

Is the Wilier Jaroon comfortable for long rides?
Yes, comfort is one of its strengths. The steel frame absorbs road vibrations, the 27.2mm seatpost adds another layer of compliance, and the relaxed geometry keeps you in a less aggressive position that's easier on your back and hands over long distances. That said, the frame is stiffer than some classic steel bikes, so it's not quite as plush as you might expect - but it's still more forgiving than most aluminium or carbon gravel bikes.

What are the main differences between the steel and aluminium Wilier Jaroon models?
The steel models emphasise durability, compliance, and a classic aesthetic, with internal welding for clean lines and a slightly more forgiving ride. The aluminium variants are typically lighter and may offer slightly more tyre clearance (up to 45mm versus 42mm), but they sacrifice some of the vibration-damping qualities of steel. Both share the same relaxed geometry and versatile, adventure-ready design, so the choice comes down to whether you prioritise weight or ride feel.