Engineered with a wider fit than standard, and featuring a carbon fibre midsole and real rubber Mountain Competition sole, the MXZ21 Winter Boots deliver exceptional power transfer to your pedals while maintaining superb traction on slippery terrain. Whether you’re climbing muddy inclines or shouldering your bike on a winter hike-a-bike section, the larger tread blocks and secure MX Competition Last ensure stability, grip, and comfort. The refined fit - a snug heel and roomy toe box - provides race-level responsiveness without compromising natural movement or warmth, making it the ideal choice for performance-driven riders.
The MXZ21 shoe’s windproof, water-resistant soft-shell upper, featuring Clarino microfibre construction, offers both durability and breathability. Reinforced with a seam-taped membrane barrier and DWR (Durable Water Repellent) coating, these boots withstand rain, mud, and grit while preventing water absorption. Regular DWR reapplication keeps them performing season after season, ensuring that when the weather worsens, you stay focused on the ride ahead.
The adjustable speed-lace system ensures a secure fit and quick adjustments on the go, ideally suited for long winter rides. And it's simple to use, even with winter gloves on, making it quick and easy to pull your Lake winter boots on and off.
The uppers are treated with a durable water-resistant (DWR) coating that will wear away over time. Lake recommend reapplying a DWR spray 1-2 times a year for moderate riders and every 2-3 wet rides for daily riders.
These off-road shoes are compatible with MTB and trekking pedal systems that utilise the 2-bolt cleat system, such as Shimano SPD, Look Trekking, X-Track, and Crankbrothers Candy.
Use the Lake Size Guide to find the correct size shoe for you. Lake claims that over 80% found their perfect fit by using this tool. Check out the Lake explainer on how to measure your foot and watch their helpful video explainer below.
Learn more about how cycling shoes should fit with the Sigma Sports guide, and speak to our team online or in store for additional help.
| MM Size (Length) | EU Size | US Size | MM Size (Width) |
|---|---|---|---|
| 243.5 - 246 | 39 | 7.0 | 100.24 |
| 246.5 - 250 | 39.5 | 7.5 | 101.24 |
| 250.5 - 253 | 40 | 7.75 | 102.24 |
| 253.5 - 256 | 40.5 | 8.0 | 103.24 |
| 256.5 - 260 | 41 | 8.5 | 104.24 |
| 260.5 - 263 | 41.5 | 9.0 | 105.24 |
| 263.5 - 266 | 42 | 9.5 | 106.24 |
| 266.5 - 270 | 42.5 | 9.75 | 107.24 |
| 270.5 - 273 | 43 | 10.0 | 108.24 |
| 273.5 - 276 | 43.5 | 10.5 | 109.24 |
| 276.5 - 280 | 44 | 11.0 | 110.24 |
| 280.5 - 283 | 44.5 | 11.5 | 111.24 |
| 283.5 - 286 | 45 | 11.75 | 112.24 |
| 286.5 - 290 | 45.5 | 12.0 | 113.24 |
| 290.5 - 293 | 46 | 12.5 | 114.24 |
| 293.5 - 296 | 46.5 | 13.0 | 115.24 |
| 296.5 - 300 | 47 | 13.5 | 116.24 |
| 303.5 - 306 | 48 | 14.0 | 118.24 |
| 313.5 - 316.5 | 50 | 15.0 | 122.24 |
Take your foot measurement in a standing position while wearing your cycling socks.
Step 1: Trace your foot onto a sheet of paper. After you trace your foot take a ruler and make a line to mark the furthest point on all four sides as shown below.
Step 2: Length measurement (Points 1 to 2 as shown below). Use a millimeter ruler to get the measurement of the longest distance from heel to longest toe (first or second toe).
Step 3: Width measurement (Points 3 to 4 as shown below). Use a millimeter ruler to get the measurement of the widest distance of foot from side to side.
Step 4: Repeat steps for other foot as your feet may be different sizes. Typically you will want shoes that accommodate your largest foot the most comfortably.
*Add +5mm to your measured length to get correct shoe length.
These are fantastic boots. They are very warm, waterproof and have been a delight for early morning commutes around 0 degrees. The sole is very stiff and so they don't feel out of place on a hard gravel ride. It's nice to have a winter boot that can be used for more hard paced rides. I had to go above my usual size - it was great being able to click and collect and try on instore. Great service from sigma as usual!
Free UK delivery on orders over £50. Orders are dispatched within 1-2 working days and typically arrive 1-2 working days later.
Return unused items in their original packaging within 30 days of delivery. Return postage is £3.50.
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