A rear tire built to grab harder out of corners and hold traction as the track breaks down. The MX34 pairs a taller, wider center block with revised carcass materials so the rear hooks up, resists chunking, and keeps feel consistent through longer motos.
Fitment Clarity
Size / position: 110/90-19 — Rear tire.
Load / speed: 62M — load index 62 (up to 265 kg) and speed rating M (up to 130 km/h).
Construction: Tube-type (TT) / bias construction for 19" rear rims.
Install Insight
This MX34 rear is tube-type — fit with a correctly sized inner tube and inspect rim tape and rim-lock before mounting. Seat the bead evenly and use a new tube when you can; avoid pinching the tube during inflation. For motocross use, riders tune rear pressure to track conditions and feel — follow Dunlop’s track pressure guidance and adjust for rider weight and terrain.
Who This Is For
Racers and committed club riders punching soft to intermediate, loamy, or mixed tracks.
Riders who want stronger drive out of corners without a vague rear end.
Anyone swapping from older Geomax fronts/rears who wants more consistent traction throughout a moto.
Key Benefit
More usable rear traction and consistent feel lap after lap — taller/wider centre blocks and improved carcass damping give cleaner acceleration and better slide control.
What’s actually changed (short)
Dunlop increased centre-block height and width on the MX34 rear and updated the carcass material. That combo boosts traction and damping, and keeps performance more consistent as tread wears. Retail specs note an ~11% taller and 44% wider centre block in the new pattern versus the previous generation.
Specification
Model: Geomax MX34 — Rear
Size: 110/90-19
Load/Speed: 62M.
Construction: Bias / Tube Type (TT).
Part #: 640329 | EAN 4038526415660.
Terrain: Soft → Intermediate / Loamy & Mixed.
FAQs
Will this fit my 19" rear on a 250/450? Yes — 110/90-19 is a standard rear size for many full-size motocross bikes. Check your OEM tire stamp to confirm. Is the MX34 tubeless or tube-type? This 110/90-19 MX34 is tube-type (TT) — plan to run an inner tube. What track conditions is it best for? Designed for soft to intermediate tracks — loam, mixed soil and rutted surfaces where traction and mud evacuation matter. How does it differ from the MX33? The MX34 uses a revised carcass and reworked block geometry for more consistent damping and stronger traction as the tyre wears. You should notice cleaner drive and steadier slide control. Any mounting tips? Use a fresh, properly sized tube, check rim tape and rim-lock, and seat the bead evenly. If you race, have a shop balance the wheel for the best handling repeatability. What pressures should I start with? Start with manufacturer/track guidance and reduce/increase by feel for your weight and soil. Dunlop’s published guidance is the baseline; many riders fine-tune from there. Is this product numbered/traceable? Yes — trade listings show part number 640329 and EAN 4038526415660 for the 110/90-19 MX34 rear. Use those when checking stock or warranty.
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