Radical Bicycle Co
Surveyor (Gravel) - Frame Only
Surveyor (Gravel) - Frame Only
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Each frame is handmade to order with a lead time of 6-8 weeks
The Surveyor…. For gravel goblins, off-road romantics, and IPA-fuelled wanderers…..
Get lost faster.
Look cooler doing it.
Reborn and Re-Designed.
Just like your friend who got really into fermentation during lockdown, 3 years later, the Surveyor is back and it has had a full-blown transformation. We’ve taken everything we loved about our old gravel & adventure frames and made it more user-friendly, build-friendly, gravel-friendly… basically friendly all around. Flat mount brakes? Check. Non-boost spacing? Double check. Compatibility nirvana? You got it.
Tame the Wild (or at Least Look Rad Trying): The Surveyor is toned down just enough from our wilder ancestors—but don’t mistake it for soft. With an aggressive front end (short stems = big steez), low stand-over height, and shorter seat tubes, you’ll feel like a mountain goat with drop bars—nimble, confident, and suspiciously stylish.
Small Batch Titanium Awesomeness
Built from beautiful, raw titanium because we know you like your bikes like you like your coffee: small batch, artisanal, and likely named after a jazz musician. The brushed finish will age like a hipster’s denim jacket—only with fewer opinions about vinyl.
We use the same grade Grade 9 3AL-2.5V seamless and ovalized Titanium as found on the Chilli Dog and Grim Ripper, fine tuned to a lighter package, specifically for the Surveyor. This shares the same values found in our other frames; strength, compliance and weight..... Ti is fly, you just haven't found it yet...
Boss Level: MAX
Whether you’re chasing sunsets, escaping the city, or just need to carry twelve litres of oat milk and a Polaroid camera—there are bosses for days. Fork, frame, triangles—we’ve given you attachment points so wild you’ll think we confused the bike for a Swiss Army knife.
Monster Clearance for Monster Plans
42T chainring and 2.0” tyre clearance means you can run fat rubber and big gears. Go on, put that XC tyre on there and pretend it’s still gravel. No one’s stopping you. Not even the terrain.
Key Features:
- Titanium frame, progressive geo
- 142x12mm non boost spacing
- Flat bar and Drop bar compatible
- Standard BSA threaded BB
- Loads of mounts, inside and out, upside down, maybe even spiritually
- 2.0” tyre clearance + 42T ring compatibility
- Designed for use with dropper post
- Optimised for 1x Drivetrains
- UDH Dropout
- 160mm Rear Flat mount (max 180mm rotor)
- Longer, slacker front ends pair to shorter stems (40-60mm)
- Short seatubes with lower standover for mount/dismount ease, and greater bicycle control
- Designed around a standard carbon gravel fork (excluded)
- Externally routed chain stays, into internally routed front triangle. All ports interchangeable for cockpit orientation.
- Made to ride hard, pack up, and disappear into the hills
- Will outrun commitment, your job, and most sunsets
- Frame weight: 1.7kg
- 5 year warranty & lifetime crash replacement for the original owner.
- Manufactured in Asia - Shaanxi Province
- MAX front travel: ATC 410mm
- Max rear rotor size: 180mm
- Seat Post: 30.9mmm internal routing only
- Seat Post Clamp: 34.9mm
- Bottom Bracket: standard 68mm threaded BSA/English
- 44mm headtube. Tapered fork headset sizes: ZS44/28.6 top headset cup, EC44/40 lower headset cup. Purchase here.
- Brake Mount: 160mm Flat
- Rear Wheel spacing: Non Boost (142mm x 12mm)
- Chain guide devices: None
- Front chain ring clearance: Max 42T
- Tire Clearance: 700x55c / 29x2.0inch
Geometry Charts & Sizing
Geo Chart:
Sizing:
Struggling with what reach to choose? Why not check out our sizing chart...
On the upper end of the recommended sizing? Opt for a longer stem (60mm)
On the lower end...? You guessed it.... Opt for a shorter stem (40mm)
Seat post insertion depths
Short, straight seat tubes allow for longer seat post insertion. Measurements allow for bosses on seat tube. Gravel bikes are generally recommended for a max 125mm dropper.
Small: 246mm
Medium: 266mm
Large: 286mm











