GREHUA 12-inch Rear Inner Tube 80/100-12 (3.00-12) 2-Pack with Valve Caps, Rasp & Patch Kit

GREHUA 80/100-12 (3.00-12) rear inner tube kit is a two‑pack replacement tube set made for 12-inch pit/dirt bikes, supplied with metal valve caps, a rasp tool and adhesive patches for quick roadside repairs.

This GREHUA inner tube is designed for small off‑road motorcycles and pit bikes that use 12" wheels and tires in the 80/100-12 or 3.00-12 range. Built from durable rubber with a straight valve stem, the kit offers compatibility across many popular models — from XR and CRF youth bikes to SSR, Coolster and Apollo models — and includes extras so you can patch or prep a valve quickly without hunting for parts.

Will this tube fit my bike’s 12" rear wheel?

If your bike uses a 12" rear rim and a tire labeled 3.00-12, 300-12, 80/100-12 or similar, this GREHUA tube is likely suitable. Check your tire sidewall size and measure rim width to confirm a match.

• Fits sizes: 3.00-12, 300-12, 80/100-12 and equivalents.
• Designed for ~80 mm (3.15") tire width; measure your tire to verify.
• Compatible with many models: XR50/70, CRF50/70/110, KLX110, TTR90/110, PW80, SSR 110/125, Coolster QG‑214, Apollo, Taotao and similar pit/dirt bikes.
• Contact seller with measurements if uncertain.

What’s included in the GREHUA tube kit and why it matters?

The kit bundles two inner tubes plus valve accessories and repair items so you’re ready for installation and basic repairs without buying extras. This is handy if you maintain more than one bike or want a spare on hand.

• 2 x GREHUA 80/100-12 inner tubes with straight valve stems.
• 2 red aluminum valve caps and 2 black valve caps for corrosion resistance and visibility.
• 1 metal rasp to clean the valve hole and ensure a secure fit.
• 6 self-adhesive round patches for quick puncture fixes.

How durable are these tubes and what materials are used?

GREHUA manufactures these tubes from premium rubber engineered to resist punctures and provide vibration damping on off‑road surfaces. The straight valve stems are reinforced and the aluminum caps reduce corrosion compared with plastic caps.

• Premium rubber compound for impact and vibration absorption.
• Puncture‑resistant design suitable for dirt and trail riding.
• Metal valve caps (red and black) reduce rust and improve durability.
• Rasp tool included to clear valve seat for proper sealing.

How do I install and maintain the GREHUA inner tube?

Installation follows standard tube replacement steps: remove wheel, deflate tire, use levers to seat bead, insert tube, slightly inflate then seat bead fully and torque to spec. Regular maintenance — proper tire pressure and quick patching of small punctures — extends tube life.

• Always check tire/rim compatibility and inspect for sharp objects before installing.
• Use the included rasp to ensure a clean valve hole before inserting the valve stem.
• Inflate incrementally while seating the tire bead to avoid pinches or twists.
• Keep a spare tube and patches in your toolkit for trail repairs.

Who this is for: Riders and mechanics of small-displacement off‑road bikes, pit bikes and youth motorcycles who need a reliable 12" inner tube replacement or spare. It’s ideal for parents maintaining youth bikes, trackside support crews, and hobbyists who want a ready repair kit with valve caps and patches included.