SKU: 35468895725
gravel bikes with threaded bottom brackets

gravel bikes with threaded bottom brackets Bombora – Crust Bikes

Sale price$25.37 Regular price$28.19
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Ships within 48 hours · Estimated delivery Aug 19 - Aug 24

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Description

gravel bikes with threaded bottom brackets Bombora – Crust BikesThe Bombora, a "gravel bike" if there ever has been one. It is essentially a sportier version of the Evasion. The biggest difference between the two is the Bombora has a 68mm bottom bracket shell, so it takes a road crank, it's ditched the Rocker Dropout for a simple 12mm thru axle dropout, and it has a lighter tube set than the Evasion. The lighter tubing reduces weight and adds a bit more compliance. It is designed around a 650b 27. 5" wheel with a

The Bombora, a "gravel bike" if there ever has been one. It is essentially a sportier version of the Evasion. The biggest difference between the two is the Bombora has a 68mm bottom bracket shell, so it takes a road crank, it's ditched the Rocker Dropout for a simple 12mm thru axle dropout, and it has a lighter tube set than the Evasion. The lighter tubing reduces weight and adds a bit more compliance. It is designed around a 650b/ 27.5" wheel with a 2.3" max tire size. The Bombora is still sporting all of the braze-ons to have some racks, fenders, or whatever you want hanging off of it. 

IMPORTANT: The Bombora is NOT a mountain bike. Yes, it fits a large tire, but the tube set is light. Think about it as a "plus" size tire gravel bike. We keep the tube set light to keep the ride quality opulent. That means it's great for bombing some road/ groads, but it's not meant for single track or a big chunky jeep trail full of rocks and huge ruts for you to run into square on. If you do ride it on that kind of stuff and break it, we will not replace it.

Build Notes:

Designed around a 650b/ 27.5" Wheel with a 2.3" max tire size.

If you want to run it 700c, your max clearance will be a 48mm tire.

Takes a ROAD crank. Ideally 1x with a maximum 44 tooth chainring. You can set it up 2x, but it's on you to figure that out.

The Bombora uses Flat Mount Calipers front and rear. If you're struggling to find a brake setup, the Crust Palm Oil Brake Kit will help solve that problem.

Max Rotor Sizes: 180 Front | 160 Rear

Front and rear thru axles are included.

The painted frames are ED Coated to help protect from the elements and inhibit internal corrosion. This doesn't mean you're free to ride it into the ocean though. 

We do not recommend you running more than ~40mm of spacers. If you need more than that, you should consider sizing up.

HEADSET NOT INCLUDED

Details:

Handmade in Taiwan using Heat Treated Chromoly

Tig Welded

Color- Turquoise Marble Blue Lug Special Edition or Pastel Violet

Sizes- Extra Small 52cm | Small 54cm | Medium 56cm | Large 58cm | Extra Large 60cm

Head Tube Diameter- 1 1/8" (Threadless steerer)

Bottom Bracket- 68mm English (BSA) Threaded

Steerer Tube Length- 400mm

Fork Spacing- 12x100mm

Rear End Spacing- 12x142mm

Front Axle Thread Pitch & Length- 1.5x120mm

Rear Axle Thread Pitch & Length- 1.5x164mm

Seat Post Diameter- 27.2mm

Fork Axle to crown - 395mm

Weight- Frame (Large)- 2.27kg or 5lbs | Fork (Uncut Steerer)- 1.36kg or 3lbs

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: 35468895725

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Houston, US
★★★★★ 5
Solid Product, lots of it too
Ive had the insane rattling from my subwoofer and the highway drone from my aftermarket exhaust, and this 80mil sound deadening mat was the exact fix I needed. The 36 sqft kit (which comes as 33 pieces) was plenty to fully cover my trunk, rear deck, and floorboards. Since it's a butyl-based material, there’s no awful asphalt smell, and it adhered incredibly well with just a simple roller. The difference is honestly night and day. My bass hits so much tighter and cleaner now without the whole back end vibrating like a tin can. Even better, the cabin is significantly quieter at high speeds; that aggressive exhaust drone is finally muffled to a deep, tolerable purr. If you want an affordable way to upgrade your audio quality and actually hear your music on long drives, I highly recommend this! It took some weekend elbow grease, but the payoff is incredible.
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Reviewed in the United States on March 24, 2026
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james
San Leandro, US
★★★★★ 5
Would recommend
Size: 10 sqft
I used this sound deadening material in my car during an audio and interior upgrade, and the difference was noticeable immediately. Road noise, vibrations, and rattling were reduced a lot, especially on the doors and floor panels. The car feels much quieter and more solid while driving now. The material was easy to cut and apply, and the adhesive stuck very well without peeling up. It has a quality feel to it and conforms nicely around curves and tight areas. I also noticed my speakers sound cleaner and have better bass response after installing it. For the price, this sound deadening material is a great value and definitely worth it if you want a quieter ride and better overall sound quality in your vehicle.
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Reviewed in the United States on June 6, 2026
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David
New York, US
★★★★★ 5
Worth it!
Size: 50 sqft
I was worried it wouldn't work as well since it's 50 mil and I thought I got the wrong thing. Nope! Works great. Did all four doors on my 93 civic and I have enough for the floor I think. Solid price. Noise reduced by about 5 decibels hive difference. Very sticky and easy to apply I'm so happy I was able to cover most all of my car. If I need more, definitely buying this since I got so much extra and I thought I would. PS: that five decibel thing is only with the four doors. My firewall is next and then my floor, but it's such a huge difference
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Reviewed in the United States on April 2, 2026
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Teresa A. Patterson
Draper, US
★★★★★ 5
Quiet your vehicle noises
Size: 50 sqft
Put this in our high roof van and couldn’t believe how much quieter it was at once. Really cut down on the vibration noise Nice and easy to install just peel n stick. Was also easy to cut with scissors for smaller areas. Seemed to be really nice quality. Didn’t notice any odor.
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Reviewed in the United States on June 9, 2026
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Stephanie
Bozeman, US
★★★★★ 5
Sound deadening the Hot Rod
Size: 20 sqft, Size: 20 sqft
Works well, good value for the money. It’s very sticky and conforms to what you are applying it to. One 20 sq ft box did approximately the passenger side
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Reviewed in the United States on April 3, 2026

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