Precaliber 12 12 Viper Red

Precaliber 12 is the perfect first bike for little riders who are ahead of the curve and ready for two wheels at a younger age than most. It has a handle built into the saddle so you can guide them as they ride, and tool-free training wheels that are super easy to install and remove. It's a great fit for kids ages 3-4, between 36-40 tall.This bike is a memory-maker: seeing your child ride their bike for the first time is something you'll never forgetThis bike is hand-me-down heaven: it's built to last, so younger siblings can inherit this bike and it'll still feel like newInvesting in a kids' bike from an established bike brand is worth it-Trek kids' bikes are designed and assembled by people who know bikesLike all Precaliber bikes, the frame is lower so it's easier for kids to stand over and hop on and offIntegrated handleHidden handle under the saddle helps you guide your child while they learn to ride.Toolless training wheelsWhen your little one is ready to ditch the training wheels, the only tools you'll need are your hands.A better way to produce aluminumStarting in 2024, we began removing high-emission aluminum from our manufacturing and replacing it with low-emission aluminum made with renewable energy. By October 2025, nearly every alloy bike we make - this one included - had made the switch, driving a major drop in our footprint.Upgrade your pedals and love your bike morePedals are two of the five touchpoints that connect you with your bike, and even though this bike comes with a pair, upgrading to pedals that boost control and grip will greatly improve your ride. See the pedal guide and find the best pedals for your riding style. We recommend flat pedals for simple versatility.FrameAlpha Silver Aluminum, 12'' kids' frame sizeForkSteel, 12'', threadless 1'' steererTireBontrager XR1, wire bead, 27 tpi., 12x2.25''Hub FrontSteel, 84mm bolt-onHub RearCoaster brake, 16T, 120mm bolt-onRimAlloy 12'', 20-hole, schrader valveCrankAlloy, 24T steel ring, chainguard, 70mm lengthBottom BracketSquare taper, 68mm, sealed cartridgeChainHV410, 1/2x1/8PedalKids' Satellite, 9/16 threadSaddleKids' padded, integrated seatpost, with handleHandlebarKids' steel, 25.4mm clamp, 80mm rise, 500mm widthStemBontrager Approved alloy, 25.4mm clamp, 15 degree rise, 50mmHeadsetAdjustable ball bearingGripsKids' grip, 107mm widthGeometry ChartB B Drop0.5B B Height16.2Chainstay Length24.3Eff Top Tube36.5Frame Reach26Frame Size Letter12"Frame Stack44.1Head Angle70.0degHead Tube Length8Offset2.5Seat Tube17.5Seat Tube Angle69.5degStandover34.3Trail3.4Wheelbase62.9Wheel Size12" kids'