Fizik tundra m5 vs saddlefiziks tundra m5 vs saddle is ideal for cross country racing and riding this saddle combines the best of fiziks rd to offer something bespoke to meet your needs a central relief channel the tundra m5 vs is relatively flat whilst keeping the long and narrow shape of earlier models so that you can deliver prime power transfer and great support without losing the freedom of movement advanced materials and hand made processes provide a saddle that is both effective an