I changed the tires on my DT VIII FS to Primo Comet Kevlars. It makes riding on-raod so much easier. I have also taken it on hard-packed gravel paths with some loose gravel on top and/or some light mud. They are ok for that, but I don't think they are good for real off-road, loose gravel roads/paths, deeper mud, or snow/ice.I run mine at the max. tire pressure, so maybe for the rougher stuff, lowering the tire pressure might help.
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TH 1.81 (133kg*62)