Wölvhammer BOA Cycling Boot
Wölvhammer BOA Cycling Boot
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Most winter boots aren't made for riding bikes — they're too warm in some spots or not warm enough in others, and they're not optimized for pedaling. Wölvhammer BOA® boots are the answer for winter riders. Designed and built for the rigors of real winter riding (deep snow, slippery ice, cold pedals), These winter bike boots are rated for comfort from 0º to 25ºF (-18º to -4ºC), slotting between our Ragnarök and Wølfgar boots. Take on winter rides with Wölvhammer.
- Rated for 0º to 25º F / -18º to -4º C comfort
- The BOA® Fit System delivers micro-adjustable, precision fit engineered to perform in the toughest conditions
- Hook-and-loop upper strap helps secure boot
- Removable synthetic liner boot for quick drying
- Waterproof breathable membrane to manage moisture
- 200 g of Primaloft® insulation
- Aerogel insulation underfoot blocks the chill from snow, ice, and cold pedals, and allows for insoles without sacrificing warmth
- Non-slip sole for walking on icy surfaces
- Compatible with flat and clipless pedals
NOTE: The webbing loop on the back of the original liner boot was not stitched properly and will come loose if pulled with too much force. All Wölvhammer BOA shipments will now include free updated liner boots with the loop sewn directly to the vertical seam on the back of the liner for a much stronger connection.
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Feature Highlights
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Micro-Adjustable BOA Fit System
The BOA Fit System provides a secure, micro-adjustable fit that lets you fine-tune your comfort with precision. With just a simple twist of the dial, you can easily tighten or loosen the boot on the fly—even with gloves on. This quick, one-handed adjustability ensures consistent foot retention, improved power transfer, and all-day comfort no matter the conditions.
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Aerogel
Aerogel is an ultra-thin, compression-resistant, NASA-grade insulation placed in the foot bed to block cold transfer from the pedals and allows the use of preferred insoles without sacrificing warmth.
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3-Piece Proprietary Bottom Unit
3/4 length nylon shank for stiffness at ball of foot; EVA foam midsole for added traction, comfort and warmth; real rubber outsole with microglass lugs for ultimate slip resistance. Removable liner boot for fast-drying and added comfort.
Additional Info
Size Chart
Footwear Sizing Assistant
Items needed: pen or pencil, large sheet of paper, tape-measure in millimeters. Measure wearing socks that you will most often wear with these boots. You will be taking measurements of both feet!
Step 1: Place a sheet of paper flat on the floor. Sit on a chair and place one foot on the paper. Apply pressure to your foot and trace the shape of that foot on the paper, carefully holding the pen vertically and perpendicular to the paper, tracing the foot as closely as possible without angling the pen in or out.
Step 2: Using a tape-measure, measure the distance from the very bottom of the heel to the top of the longest toe, as illustrated in points A and B on the diagram. It is necessary to measure in three-digit millimeters (for example: 292mm)
Step 3: Measure the distance spanning the ball of the foot at its widest point, as illustrated in points C and D on the diagram, using two or three digit millimeter measurements depending on the size of your foot.
Step 4: Repeat the above steps for your other foot and compare the measurements. Find the longer of the two length measurements between your right and left feet, as well as the wider of the two width measurements.
Step 5: Use the longest length measurement and the widest width measurement in three-digit millimeters to reference the chart and find the appropriate size.

Size | Length | Width |
---|---|---|
38 | 210.00–236.50mm | 85.00–92.00mm |
39 | 236.50–243.00 | 87.00–94.00 |
40 | 243.00–250.00 | 88.00–95.00 |
41 | 250.00–256.00 | 89.00–97.00 |
42 | 256.00–262.50 | 90.00–98.00 |
43 | 262.50–268.50 | 93.00–100.00 |
44 | 268.50–276.00 | 93.00–99.00 |
45 | 276.00–283.00 | 95.00–104.00 |
46 | 283.00–291.00 | 96.00–107.00 |
47 | 291.00–296.50 | 97.00–110.00 |
48 | 296.50–303.50 | 99.50–114.00 |
50 | 303.50–315.50 | 102.00–120.00 |
Care Instructions
Spot clean. Avoid force-dried heat
Materials
Upper: Synthetic Leather, Polyester Mesh; Lining: Polyester; Outer Sole: Rubber
Warranty
45NRTH guarantees its products against defects in materials and workmanship for a period of twenty-four (24) months from the original date of purchase, subject to the limitations below. The proof of purchase date is the one that is specified on the retail sales receipt issued by the authorized 45NRTH dealer. This warranty does not cover the following:
- Damage due to improper assembly or follow-up maintenance or lack of skill, competence or experience of the user or assembler
- Products that have been modified, neglected, used in competition or for commercial purposes, misused or abused, involved in accidents or anything other than normal use
- Damage or deterioration to the surface finish, aesthetics or appearance of the product
- Normal wear and tear
- Minimal loss of studs on studded tires (it is common to lose 5-10 studs under normal use)
- Labor required to remove and/or refit and re-adjust the product within the bicycle assembly
This limited warranty is expressly limited to the repair or replacement of a defective product, at the option of 45NRTH, and is the sole remedy of the warranty. This limited warranty applies only to the original purchaser of the 45NRTH product and is not transferrable. This warranty applies only to 45NRTH products purchased through an authorized dealer or distributor. In no event shall 45NRTH be liable for any loss, inconvenience or damage, whether direct, incidental, consequential, or otherwise resulting from breach of any express or implied warranty or condition, of merchantability, fitness for a particular purpose, or otherwise with respect to 45NRTH products except as set forth herein. This warranty gives the consumer specific legal rights, and those rights and other rights may vary from place to place. This warranty does not affect your statutory rights.
TO THE EXTENT NOT PROHIBITED BY LAW, THESE WARRANTIES ARE EXCLUSIVE AND THERE ARE NO OTHER EXPRESS OR IMPLIED WARRANTIES OR CONDITIONS INCLUDING WARRANTIES OR CONDITIONS OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.