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MOSTPLUS FRP Hard 3-Fold Tonneau Cover

A tonneau cover from MOSTPLUS: hard tri-fold, 350 lb load rating. MOSTPLUS makes it for 12 truck generations, each with its own part number and conditions.

By the FitsMyTruck team. Figures come from MOSTPLUS's own spec sheets and fit charts, part numbers are checked against the live listings, and the page is reviewed before it goes up. Last reviewed Oct 24, 2026.

The MOSTPLUS FRP Hard 3-Fold Tonneau Cover in brief

Two published figures set the MOSTPLUS FRP Hard 3-Fold Tonneau Cover apart: a distributed load rating of 350 lb and a warranty of 1 year. The panels are FRP, the cover is a hard tri-fold, and the install is clamp-on with no drilling. MOSTPLUS (mostplusauto.com) lists 14 part numbers for the line, every one ending in -SH or -MSH. They cover twelve trucks, among them the 2015-2026 Ford F-150, the 2014-2026 Silverado and Sierra 1500, the Ram 1500, the Toyota Tundra back to 2007, the Nissan Frontier back to 2005, the 2017-2026 Honda Ridgeline and the Ford F-250 / F-350 Super Duty back to 1999. Bed lengths run from 5 ft on the Ridgeline to 6.8 ft on the Super Duty. MOSTPLUS publishes those lengths as nominal feet, so treat them as the maker's class sizes and confirm against your own bed.

hard tri-foldCover type
FRPPanel material
350 lbDistributed load rating
1 yearsWarranty

Part numbers, applications and specifications

  • M042141-SH

    3-Fold 5.5FT FRP Hard Tonneau Cover For 2015-2026 Ford F-150 F150 Truck Bed

    • Cover typehard tri-fold
    • Panel materialFRP
    • Distributed load rating350 lb
    • Warranty1 years
    • Install methodclamp-on, no drill
    No Amazon listing found

  • M042145-SH

    3-Fold 6.5FT FRP Hard Tonneau Cover For 2015-2026 Ford F-150 F150 Truck Bed

    • Cover typehard tri-fold
    • Panel materialFRP
    • Distributed load rating350 lb
    • Warranty1 years
    • Install methodclamp-on, no drill
    No Amazon listing found

  • M042141-MSH

    5.5FT Tri-Fold FRP Hard Tonneau Cover For 2015-2026 Ford F-150 (2022-2026 Lightning) Truck Bed, Fiberglass HD Cover

    • Cover typehard tri-fold
    • Panel materialFRP
    • Distributed load rating350 lb
    • Warranty1 years
    • Install methodclamp-on, no drill
    No Amazon listing found

  • M042145-MSH

    6.5FT Tri-Fold FRP Hard Truck Tonneau Cover For 2015-2026 Ford F-150 Standard Truck Bed, On Top Style

    • Cover typehard tri-fold
    • Panel materialFRP
    • Distributed load rating350 lb
    • Warranty1 years
    • Install methodclamp-on, no drill
    No Amazon listing found

  • M042249-SH

    3-Fold 6.5FT FRP Hard Tonneau Cover For 2014-2026 Silverado Sierra 1500, 2015-2019 Silverado Sierra 2500 3500 Truck Bed

    • Cover typehard tri-fold
    • Panel materialFRP
    • Distributed load rating350 lb
    • Warranty1 years
    • Install methodclamp-on, no drill
    No Amazon listing found

  • M042241-SH

    5.8FT FRP Hard 3-Fold Truck Tonneau Cover For 2007-2026 Chevy Silverado GMC Sierra 1500 Bed, On Top Style

    • Cover typehard tri-fold
    • Panel materialFRP
    • Distributed load rating350 lb
    • Warranty1 years
    • Install methodclamp-on, no drill
    No Amazon listing found

  • M042341-SH

    3-Fold 5.6/5.7FT FRP Hard Tonneau Cover For 2009-2026 Ram 1500 Truck Bed

    • Cover typehard tri-fold
    • Panel materialFRP
    • Distributed load rating350 lb
    • Warranty1 years
    • Install methodclamp-on, no drill
    Check price on Amazon

  • M042342-SH

    3-Fold 6.4FT FRP Hard Tonneau Cover For 2003-2026 Dodge Ram 1500 2500 3500 Truck Bed

    • Cover typehard tri-fold
    • Panel materialFRP
    • Distributed load rating350 lb
    • Warranty1 years
    • Install methodclamp-on, no drill
    Check price on Amazon

  • M042442-SH

    3-Fold 5.5FT FRP Hard Tonneau Cover For 2014-2026 Toyota Tundra Truck Bed

    • Cover typehard tri-fold
    • Panel materialFRP
    • Distributed load rating350 lb
    • Warranty1 years
    • Install methodclamp-on, no drill
    Check price on Amazon

  • M042446-SH

    5.5FT FRP Hard Tri-Fold Tonneau Cover For 2022-2026 Toyota Tundra Truck Bed

    • Cover typehard tri-fold
    • Panel materialFRP
    • Distributed load rating350 lb
    • Warranty1 years
    • Install methodclamp-on, no drill
    Check price on Amazon

  • M042445-SH

    3-Fold 6.5FT FRP Hard Tonneau Cover For 2007-2026 Toyota Tundra Truck Bed

    • Cover typehard tri-fold
    • Panel materialFRP
    • Distributed load rating350 lb
    • Warranty1 years
    • Install methodclamp-on, no drill
    Check price on Amazon

  • M042546-SH

    6FT FRP Hard 3-Fold Tonneau Cover For 2005-2026 Nissan Frontier Truck Bed, On Top Style

    • Cover typehard tri-fold
    • Panel materialFRP
    • Distributed load rating350 lb
    • Warranty1 years
    • Install methodclamp-on, no drill
    No Amazon listing found

  • M042741-SH

    5FT 3-Fold FRP Hard Tonneau Bed Cover For 2017-2026 Honda Ridgeline Truck Bed

    • Cover typehard tri-fold
    • Panel materialFRP
    • Distributed load rating350 lb
    • Warranty1 years
    • Install methodclamp-on, no drill
    Check price on Amazon

  • M042146-SH

    6.8FT 3-Fold FRP Hard Tonneau Cover For 1999-2026 Ford F-250/350 Super Duty Truck Bed

    • Cover typehard tri-fold
    • Panel materialFRP
    • Distributed load rating350 lb
    • Warranty1 years
    • Install methodclamp-on, no drill
    Check price on Amazon

Which part number is yours

Four F-150 listings share the 2015-2026 range. M042141-SH and M042141-MSH are 5.5 ft, M042145-SH and M042145-MSH are 6.5 ft, and M042141-MSH adds the 2022-2026 Lightning. MOSTPLUS words the 5.5 ft F-150 listing as Super Crew Cab, only 5.5FT bed. The -MSH listings warn that some Multi-Function, MultiPro or MultiFlex tailgates may not close electronically and may need to be closed manually. For Silverado and Sierra, M042249-SH is the 6.5 ft bed and will not fit factory side storage boxes or the CarbonPro bed. M042241-SH is the 5.8 ft part, and its 2007-2026 range comes with the note 2019 Classic model Only, so new-body fit is unclear. Ram parts M042341-SH (5.6/5.7 ft) and M042342-SH (6.4 ft) exclude RamBox. Tundra parts exclude the Trail Special Edition storage boxes, and M042442-SH also excludes toolbox models.

Trucks it fits

  • 2015-2020 Ford F-150

    • Fits 5.5 ft bed, M042141-SH
    • Fits 6.5 ft bed, M042145-SH
    • Fits 5.5 ft bed, M042141-MSH
    • Fits 6.5 ft bed, M042145-MSH

    MOSTPLUS lists this for the 2015 to 2026 Ford F-150 Super Crew Cab with the 5.5-foot bed only, and for the 2022 to 2026 Lightning with a 5.5-foot bed. Tyger says cab size does not matter, so the Super Crew Cab wording may be loose. MOSTPLUS lists this for the 2015 to 2026 Ford F-150 with a 6.5-foot bed and the 2022 to 2025 Lightning. One product covers both generations.

    Check price on AmazonTonneau covers for this truck, bed 1Tonneau covers for this truck, bed 2

  • 2021-2026 Ford F-150

    • Fits 5.5 ft bed, M042141-SH
    • Fits 6.5 ft bed, M042145-SH
    • Fits 5.5 ft bed, M042141-MSH
    • Fits 6.5 ft bed, M042145-MSH

    MOSTPLUS lists this for the 2015 to 2026 Ford F-150 Super Crew Cab with the 5.5-foot bed only, and for the 2022 to 2026 Lightning with a 5.5-foot bed. Tyger says cab size does not matter, so the Super Crew Cab wording may be loose. MOSTPLUS lists a single SKU that covers both the 2015-2026 Ford F-150 with a 6.5 ft bed and the 2022-2025 F-150 Lightning.

    Check price on AmazonTonneau covers for this truck, bed 1Tonneau covers for this truck, bed 2

  • 2019-2026 Chevrolet Silverado 1500

    • Fits Standard Bed bed, M042249-SH

    MOSTPLUS lists this 6.5 ft cover for the 2014-2026 Silverado 1500 and Sierra 1500. It states the bed as 6.5 ft, and the 2019 and newer 6.6 ft bed is in the same 6 ft 7 in class.

    Check price on AmazonAll tonneau covers for this truck

  • 2019-2026 GMC Sierra 1500

    • Fits Standard Bed bed, M042249-SH

    MOSTPLUS lists this 6.5 ft cover for the 2014-2026 Silverado 1500 and Sierra 1500. It states the bed as 6.5 ft, and the 2019 and newer 6.6 ft bed is in the same 6 ft 7 in class.

    Check price on AmazonAll tonneau covers for this truck

  • 2019-2026 Ram 1500

    • Fits 5.58 ft bed, M042341-SH
    • Fits 6.33 ft bed, M042342-SH

    MOSTPLUS lists this 5.6/5.7 ft cover for the 2011-2026 Ram 1500, new body and Classic model style. It excludes RamBox, roll bar and stepside trucks, and it needs no factory cargo track bracket kit. For the 2021 electric tailgate, it fits only the version without a ladder. MOSTPLUS's 6.4 ft listing includes the 2019-2026 Ram 1500 new body style with the Fleetside 6.4 ft bed. It will not fit models with RamBox.

    Check price on AmazonTonneau covers for this truck, bed 1Tonneau covers for this truck, bed 2

  • 2022-2026 Toyota Tundra

    • Fits 5.5 ft bed, M042442-SH
    • Fits 5.5 ft bed, M042446-SH
    • Fits 6.5 ft bed, M042445-SH

    MOSTPLUS lists this 3-fold 5.5 ft FRP hard tonneau cover for the 2014-2026 Toyota Tundra. It excludes Trail Special Edition storage boxes and toolbox models. MOSTPLUS lists this 5.5 ft FRP hard tri-fold tonneau cover for the 2022-2026 Toyota Tundra.

    Check price on AmazonTonneau covers for this truck, bed 1Tonneau covers for this truck, bed 2

  • 2022-2026 Nissan Frontier

    • Fits King Cab bed bed, M042546-SH
    • Fits 6 ft bed, M042546-SH

    MOSTPLUS M042546-SH is a 6 ft 3-fold FRP hard tonneau cover, on-top style, for the 2005-2026 Nissan Frontier with the 6 ft Fleetside bed only. It fits with or without the factory deck rail system, and some Multi-Function, MultiPro or MultiFlex tailgates may need to be closed by hand.

    Check price on AmazonAll tonneau covers for this truck

  • 2005-2021 Nissan Frontier

    • Fits King Cab bed bed, M042546-SH
    • Fits Crew Cab Long Bed bed, M042546-SH

    MOSTPLUS M042546-SH is a 6 ft 3-fold FRP hard tonneau cover, on-top style, for the 2005-2026 Nissan Frontier with the 6 ft Fleetside bed only. It fits with or without the factory deck rail system, and some Multi-Function, MultiPro or MultiFlex tailgates may need to be closed by hand.

    Check price on AmazonAll tonneau covers for this truck

  • 2017-2026 Honda Ridgeline

    • Fits Truck bed bed, M042741-SH

    MOSTPLUS M042741-SH is a 5 ft 3-fold FRP hard tonneau cover for the 2017-2026 Honda Ridgeline with the Fleetside/Styleside bed. MOSTPLUS states no bed-system or tailgate conditions.

    Check price on AmazonAll tonneau covers for this truck

  • 2023-2026 Ford F-250 / F-350 Super Duty

    • Fits 6.75 ft bed, M042146-SH

    MOSTPLUS M042146-SH is a 6.8 ft 3-fold FRP hard tonneau cover for the Ford F-250 and F-350 Super Duty with the Fleetside/Styleside 6.8 ft bed. One cover fits every year from 1999 to 2026.

    Check price on AmazonAll tonneau covers for this truck

  • 2014-2018 Chevrolet Silverado 1500

    • Fits 5.67 ft bed, M042241-SH
    • Fits 6.5 ft bed, M042249-SH

    MOSTPLUS M042241-SH is a 5.8 ft 3-fold FRP hard tonneau cover, on-top style, for the 2007-2026 Chevrolet Silverado 1500 and GMC Sierra 1500 with the 5.8 ft Fleetside bed. It is not for trucks with the cargo rack system (remove it before installing) or the factory utility track. On a CarbonPro bed liner, a slot must be cut for the clamp. MOSTPLUS M042249-SH is a 3-fold 6.5 ft FRP hard tonneau cover for the 2014-2026 Silverado and Sierra 1500 with the 6.5 ft bed, and it is also listed for the 2015-2019 Silverado and Sierra 2500 and 3500. It will not fit with the factory side storage boxes or the CarbonPro bed, and it fits only trucks without the MultiPro or MultiFlex tailgate.

    Check price on AmazonTonneau covers for this truck, bed 1Tonneau covers for this truck, bed 2

  • 2007-2021 Toyota Tundra

    • Fits Standard Bed bed, M042445-SH
    • Fits Short Bed bed, M042442-SH

    MOSTPLUS M042445-SH is a 3-fold 6.5 ft FRP hard tonneau cover for the 2007-2026 Toyota Tundra with the 6.5 ft bed, with or without the factory deck rail system. It fits Fleetside/Styleside models only and does not fit the Trail Special Edition with storage boxes. MOSTPLUS M042442-SH is a 3-fold 5.5 ft FRP hard tonneau cover for the 2014-2026 Toyota Tundra with the 5.5 ft bed, with or without the factory deck rail system. It does not fit the Trail Special Edition with storage boxes or models with a toolbox. MOSTPLUS lists it from 2014, so it covers only the 2014-2021 part of this generation, and 2007-2013 short beds have no MOSTPLUS cover.

    Check price on AmazonTonneau covers for this truck, bed 1Tonneau covers for this truck, bed 2

Before you buy a tonneau cover

Questions owners ask

What is the load rating on the MOSTPLUS FRP 3-fold cover?

MOSTPLUS publishes a distributed load rating of 350 lb for the line. It is the only load figure MOSTPLUS lists for the 14 part numbers.

How long is the MOSTPLUS 3-fold warranty?

MOSTPLUS lists a warranty of 1 year for the FRP Hard 3-Fold line.

Does the MOSTPLUS 3-fold fit a Ram with RamBox?

No. MOSTPLUS says the 5.6/5.7 ft part, M042341-SH, will not fit Rambox, roll bar or stepside models, and the 6.4 ft part, M042342-SH, will not fit models with Ram Box.

Will the MOSTPLUS 3-fold fit a 2019 or newer Silverado?

The 6.5 ft part, M042249-SH, is listed for 2014-2026 Silverado and Sierra 1500 but not with factory side storage boxes or CarbonPro. The 5.8 ft part, M042241-SH, carries a 2019 Classic model Only note, so its fit on the new body is unclear.

Where these figures come from

Every figure above is MOSTPLUS's own, from its spec sheets, fit charts and install guides, checked on Oct 24, 2026.

1 maker documents
  • MOSTPLUS, manufacturer product feed (Shopify products.json), read Oct 24, 2026
MOSTPLUS FRP Hard 3-Fold Tonneau Cover M042341-SHCheck price on Amazon