SKU: 45772750786
mountainbike framemaat 21 inch

mountainbike framemaat 21 inch 29er Carbon MTB Bike Hardtail Frame M17 L(19 inch) / UDM

Sale price$20.57 Regular price$22.86
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Ships within 48 hours · Estimated delivery Jul 24 - Jul 29

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Description

mountainbike framemaat 21 inch 29er Carbon MTB Bike Hardtail Frame M17 L(19 inch) / UDMThe features of 29er Hardtail MTB Frame M17 Tapered headtube reduce cross section area, improve performance, reduce wind resistance and enhance aerodynamic effect BB92 buttom bracket, wider and stronger torsional rigidity Direct mount front derailleur get the best quality and reliability 12x142mm Rear Spacing 2 year warranty for manufacturer defects, lifetime crash replacement program ( discount for new frame ) Fancy cross country mountain biking?

The features of 29er Hardtail MTB Frame M17
  • Tapered headtube-reduce cross section area, improve performance, reduce wind resistance and enhance aerodynamic effect
  • BB92 buttom bracket, wider and stronger torsional rigidity
  • Direct mount front derailleur-get the best quality and reliability
  • 12x142mm Rear Spacing
  • 2 year warranty for manufacturer defects, lifetime crash replacement program ( discount for new frame )

Fancy cross-country mountain biking? Want a waif-like carbon steed to help you to a step on the  podium? But you do not want to spend a crazy amount to make this happen? We have built you your dream frame then. Our M17 carbon fibre XC mountain bike frame is just for you.

We have used aerospace grade carbon fibre to make sure that the ride quality of the M17 frame is out of the world. We also know that even if a frame is comfortable that alone will not win races, so we have worked hard to make sure the frame is light and super stiff where you need it to be stiff. We even made sure that your cables stay hidden through our internal routing.

To create a more substantial bottom bracket area we have used a BB92 bottom bracket shell. This gives our engineers more space to play with and look at the size of our chainstays, and down tube, your pedaling effort will not be flexing ant of these carbon tubes. Our chain stays run all the way to a 142 x 12mm rear thru axle, meaning your wheel will have no room to move it will be held tightly in place.

The downtube mates up with our tapered headtube, you will have no problem finding a fork to fit this XC beast. This frame will then go precisely where you point it, and it will not let you take B-lines you will be A-line through all the courses. Our carbon seat stays, and top tube though are designed to help manage the stiffness from below and cancel out any vibrations, adding a bit of vertical compliance to your ride.

Specification

Type Mountain Bike Frame
Wheel Size 29ER
Material T700 carbon fiber
Weave UD
Finish Clear Coating
 Frame Weight 1173g(17 inch)
Frame Size 15/17/19/21''
Headset Top 1-1/8",down 1- 1/2"
BB BB92
Model M17
Seatpost 31.6mm
Seatpost Clamp 37 mm
Max Tires 29 x 2.3''

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 45772750786

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Liza Jane
Lexington, US
★★★★★ 5
Quality and comfort
Size: 10.5-11.5 Women/9-10 Men, Color: Black
Comfortable and fit well. I got these to replace a very old pair that finally wore out! Warmth is medium (I wear puffer booties for when it's really cold). Quality on these is great!
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Reviewed in the United States on March 9, 2026
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V M T R
Waukegan, US
★★★★★ 5
Can't go wrong with Acorn for as long as they last!
Size: 12-13 Women/10.5-11.5 Men, Color: Charcoal
Acorn is just a great company all around. I had bought my husband these slippers over 20 years ago. They are still in great shape although the sole has worn in some places. But nothing's coming apart! However, I decided to replace them for him. His foot is 10.5 and they are a little hard to get on right away-of course, after over 20 years of having "worn in" the original pair, anything would feel tight. So I'm not holding this against them. They will relax with use. The only difference is that the original sole was black and these are tan. I think I would prefer the black, but since it's only being worn in the house, no big deal. My husband has really cold feet and these slippers never fail to warm his feet right up! He said they feel really soft to walk in and like the cushioning. They're not too heavy and fit him great! I have Acorn slippers myself that I've worn every single day in the house and outside to the mailbox too. They last.
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Reviewed in the United States on April 11, 2026
M
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Michael
Fort Morgan, US
★★★★★ 4
Very warm.
Size: 13.5-14.5 Women/12-13 Men, Color: Navy Blue
Very warm and comfortable. A little difficult to put on with the collared top.
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Reviewed in the United States on January 19, 2026
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Cheryl
Dallas, US
★★★★★ 5
You won't be sorry
Size: 10.5-11.5 Women/9-10 Men, Color: Black
Great padding for comfort and terrific warmth. I bought a pair of Acorns 30 years ago and still have them. Updated to a new color and now feel the benefit of newer padding! I used the sizing listed for shoes and like the roominess for thicker sox. Well made and a joy to put on. (Wisconsin)
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Reviewed in the United States on December 25, 2025
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Bureau of Review
Carnegie, US
★★★★★ 5
Great Slippers
Size: 12-13 Women/10.5-11.5 Men, Color: Charcoal
Comfy, great price, looks great, fits well, size aligned, great quality. Love these slippers.
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Reviewed in the United States on February 16, 2026

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