Idahos Tumbleweed Bicycle Company offers best-in-class bicycles and bike bits specially made for bikepacking and mountain bike touring. This week, they add another steed to the line, introducing the Sunliner. This is a fully rigid, flat bar, mountain touring bike. Tumbleweed says the Sunliner fits into their ethos as an off-road touring bike built with top quality materials.(Photos / Tumbleweed Bicycles)Daniel Molloy, Tumbleweed Bicycles founder, is no stranger to offering iconic, capable, and purpose-built bikepacking bikes. Bikes like the award-winning Stargazer and the stout and trusted Prospector have been ridden thousands of miles across many continents. The new Sunline sits right in between those models.Sunliner in RhubarbSunliner in British racing GreenThe Sunliner came about as a way to offer the customers who wanted a Prospector with a derailleur spec, and a Stargazer with a flat bar. The Sunliner looks to be a versatile, and all-around touring bike. And if ridden unloaded, it looks like a great all-terrain bike. The Sunliner can be run with modern 1x mountain drivetrains, along with a variety of different tire and rim combinations. It has a comfy upright riding position and a ton of mounts for racks and bags. More Than a Stargazer/Prospector Mash-upThe Sunliner is built using a unique tubeset that is lighter than the Prospector, rigid specific, and optimized for traditional boost drivetrains. When compared to the Stargazer, the Sunliners frame tubing is optimized for the longer top tubes needed for flat bar geometry. It can fit 293.0 tires and still run a 38-tooth chainring, so tire clearance is great. When designing the chainstays for the Sunliner, they were made to give great tire clearance while also eliminating heel strikes if panniers are in use. M6 mounting points are used all around for added strength mounting racks and securing gear. Sunliner Retail and Frame SpecsRetail: $1400 (frameset)Retail: $3775 (complete with standard spec *see below*)The Sunliner is sold as a complete bike, built to your specifications, or as a frameset. It comes in two colors, British Racing Green and Rhubarb. They are available either directly from Tumbleweed Bicycles or their retailers. FramesetFrame SpecsSizes: Small Medium Large Extra LargeTubing: Heat-treated, size-specific Cromoly tubing. Oversized triple and quad butted main triangle with integrated gussetsColors: Forest Green or Rhubarb (dark pink). Both with gold Tumbleweed graphicsTire Clearance: Optimized for 292.6, clearance for up to 29 x 3 (Tested with WTB Ranger tire on 40mm internal rim width)Head Tube Diameter: 44mm I.D. for ZS44 upper, EC44 lower cupsBottom Bracket: 73mm BSA threadedSpacing: Boost 148mm x 12mm thru axle (included)Seat Post Diameter: 31.6Seat Collar Diameter: 35mm (included)Dropper routing: External routing on the down tube with internally routed seat tubeDriveline: 1x drivetrain specific. Not designed to accommodate a front derailleurChainring Clearance 38 tooth maxBrake Compatibility 180mm or 160mm IS mount, front and rear with external cable routingCage/Bottle mounts 2 bolt/H2O mounts on seat tube (all sizes), one 3 pack on top of down tube (small only 2 bolt/H20 ), one 3 pack mount under down tube (all sizes)Rack (6mm lower mount) and Fender & seat stay mounts (5mm)Fork SpecsTire Clearance 29 x 3 (Tested with WTB Ranger tire on 40mm internal rim width)Spacing: Boost mountain 110x15mm thru axle (included)3 pack mounts angled rearwardLow rider mountsUpper fork crown rack mounting pointsCenter hole on the fork crownGenerator wiring port on the lower right legRack & Fender mountsSame fork specifications as Stargazer 440mm Axle to Crown with 55mm offsetSunliner GeometrySunliner GeometrySmallMediumLargeExtra LargeEffective Top Tube Length600mm620mm640mm660mmSeat Tube Length380mm430mm480mm545mmHead Tube Angle69696969Seat Tube Angle73737373Bottom Bracket Drop*65mm65mm65mm65mmChainstay Length*456mm456mm456mm456mmHead Tube Length130mm150mm175mm210mmFork Length440mm440mm440mm440mmWheelbase1131mm1153mm1175mm1197mmFork Offset55mm55mm55mm55mmRecommended Rider Height52-5756-510510-6261-67Recommended Rider Saddle Height63-68cm67-73cm74-81cm80-88cmSunliner Standard SpecPartDescription(Parts subject to change based on availability)FrameSunlinerBritish Racing Green/Rhubarb S/M/L/XLForkSteel Unicrown110mm Thru Axle UnicrownHeadsetCane Creek 40ZS upper, EC lower, 30mm Crown RaceCranksetRaceFace AeffectBlack, alloyChainringRaceFace Aeffect, steel32t, black alloyBottom BracketRaceFaceBSA ThreadedFront HubDT Swiss 350Black, 110mm Thru Axle 32 holeRear HubDT Swiss 350Black, 148x12mm 32 hole, XD FreehubCassetteGX Eagle, Lunar10-52tShifterSRAM GX EagleblackRear DerailleurGX Eagle, LunarblackRimsRaceFace ARC3029 x i30mmSpokesSapim RaceBlack 2.0/1.8 w/Brass nipplesBrake LeversAvid FR5Black, alloyBrake CalipersAvid BB7BlackCables and HousingJagwire Pro CompressionlessStainless Cables, Black HousingDisc Brake Rotor AdaptorPromaxBlack aluminumBrake RotorsSRAM Centerline180mm front and rearTiresMaxxis Rekon Race29 x 2.4 EXO 3C TRChainSRAM GX EaglesilverGripsSQLabs 710blackStemZoomBlack 31.8mm 4 boltHandlebarTumbleweed PersuaderBlack 20 or 30 degreeSeatpostPNW Loam dropper and triggerBlack, travel length based on saddle height, frame sizeSaddleWTB PureBlack, Steel RailsTubeless PartsTubeless Sealant, Valves and TapeHeadset SpacersBlack, AluminumGet your dirt tour on at the link below. TumbleWeed.ccThe post Tumbleweed Bikes Announces the Sunliner Flat Bar Mountain Touring Bike appeared first on Bikerumor.