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Amazon item B01CQ6PY6A (refresh pending)

$39.99 (Price correct as of 11/12/2026 13:25 PST · Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.)

The Planet Bike Big Buck is a black rear bike fender with seatpost mounting, an extra wide 4.5 inch profile, and angle adjustability. It is described for 90-120 mm widths, 3-5 inch tires, and 26 inch, 650b, 29 inch, and 700c wheels, so wheel size and tire width are the main checks before choosing an offer.

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Quick Summary

The Planet Bike Big Buck is a rear bike fender in black with a seatpost-mounted design. It is described as having an extra wide 4.5 inch profile, and it is made for fat bikes and other bikes that use the stated tire and wheel size range.

The key fit checks are the stated fender width, wheel size, and angle adjustability. Those details matter most when you are comparing this fender with your bike setup.

Key Details

Detail Product information and buyer relevance
Product type Rear bike fender. This is the main part to compare against your bike setup.
Mounting Seatpost mounted. Confirm that this mounting style works with your bike.
Profile Extra wide 4.5 inch profile. Width is a key factor for rear spray coverage and frame clearance.
Fender width 90-120 mm for 3-5 inch wide tires. Check tire width before choosing an offer.
Wheel size 26 inch, 650b, 29 inch and 700c. Match the wheel size to your bike.
Adjustment Angle adjustability. This helps with positioning the fender to fit the bike.
Weight 220 grams. Useful if bike weight is part of your decision.
Color Black. Useful when matching the bike or other accessories.

What to Compare Before Buying

  • Tire width: The stated fit range is 3-5 inch wide tires, so compare that with your rear tire size.
  • Wheel size: Confirm that your bike uses 26 inch, 650b, 29 inch, or 700c wheels.
  • Mounting style: This model mounts to the seatpost, so check that your bike has the right setup for that attachment point.
  • Clearance: The extra wide profile is a useful check when space around the rear wheel matters.
  • Adjustment: Angle adjustability gives you another fit point to compare if your bike needs a specific fender position.

Who This Product May Suit

This rear fender may suit riders with fat bikes or other bikes that match the stated wheel and tire size range. It is also relevant if seatpost mounting is the style you want for the rear wheel area.

Before You Decide

Confirm the wheel size, tire width, and seatpost mounting setup before choosing an offer. If those points match your bike, the black Big Buck rear fender is easier to compare against other rear fender options.

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