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Top 5 Plus-Tire Compatible Steel Mountain Framesets in Canada — 2025 Expert Picks for Traction, Durability and Agility

Published on Monday, August 25, 2025

Plus-tire compatible steel mountain framesets are engineered with generous tyre clearance and reinforced chainstays and seatstays to accept wider, plus-size tyres. These frames are often paired with wider rims, Boost hub spacing and trail-tuned geometry to deliver improved traction, flotation on loose or soft terrain, and predictable handling at lower speeds. In Canada this category appeals to riders who prioritize durability and ride comfort in variable conditions — from rocky singletrack and wet, loamy trails to winter punchy snow — and to those who value the repairability and resilience of steel in backcountry or bikepacking scenarios. Buyers choose plus-compatible steel framesets for their combination of control, compliance and long-term serviceability when riding technical or unpredictable terrain.

Quick Menu

1. Best Versatile Plus

2. Best Budget Friendly Plus

3. Best Modern Geometry Plus

4. Best Hardtail Trail Plus

5. Best Premium Steel Plus

1
BEST VERSATILE PLUS

Surly Karate Monkey Frameset

Surly

The Surly Karate Monkey frameset is a best-in-class, do-everything steel hardtail that pairs classic durability with modern geometry and deliberate clearance for plus-size tires. It stands out for exceptional value and broad aftermarket support—making it a more affordable, highly serviceable choice compared with boutique options like Chromag while offering more trail-focused geometry than the Timberjack.

4.4
★★★★☆
  • Versatile wheel fit

  • Burly steel backbone

  • Versatile wheel fit

  • Burly steel backbone

Review Summary

88%

"Most owners praise the Karate Monkey frameset for its durable steel construction, comfortable compliance, and roomy tire clearance that handles plus tires well; common complaints are its weight and more conservative geometry compared with modern trail frames."

  • Grin-inducing agility

  • 4130 chromoly steel frame that balances strength and ride comfort.

  • Grin-inducing agility

  • 4130 chromoly steel frame that balances strength and ride comfort.

Enhanced Physical Well-Being

Recreational Enjoyment

Skill Development & Mastery

The Surly Karate Monkey frameset is a best-in-class, do-everything steel hardtail that pairs classic durability with modern geometry and deliberate clearance for plus-size tires. It stands out for exceptional value and broad aftermarket support—making it a more affordable, highly serviceable choice compared with boutique options like Chromag while offering more trail-focused geometry than the Timberjack.

  • Versatile wheel fit

  • Burly steel backbone

  • Grin-inducing agility

  • 4130 chromoly steel frame that balances strength and ride comfort.

  • Generous tire clearance to accommodate 27.5+ and many 29+ setups.

  • Versatile wheel fit

  • Burly steel backbone

  • Grin-inducing agility

  • 4130 chromoly steel frame that balances strength and ride comfort.

  • Generous tire clearance to accommodate 27.5+ and many 29+ setups.

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$900-1200 CAD

2
BEST BUDGET FRIENDLY PLUS

Salsa Timberjack Steel Frameset

Salsa

The Salsa Timberjack Steel frameset is purpose-built for wide-tire adventure and winter riding, with a comfortable, stable ride and plenty of mounts for racks and fenders that make it a financial and practical favorite for bikepackers. Compared with the Karate Monkey it favors touring versatility over aggressive trail bias, and it typically undercuts premium trail frames on price while still accepting true plus tires.

4.3
★★★★☆
  • Plus-ready clearance

  • Trail-smoothing geometry

  • Plus-ready clearance

  • Trail-smoothing geometry

Review Summary

86%

"Reviews applaud the Timberjack steel frameset for its simplicity, predictable handling, and excellent compatibility with plus tires for mixed-terrain riding; detractors note it is a bit heavy and not as progressive in geometry as newer designs."

  • Pack-hauler charm

  • Chromoly steel construction optimized for stability with plus tires.

  • Pack-hauler charm

  • Chromoly steel construction optimized for stability with plus tires.

Recreational Enjoyment

Enhanced Physical Well-Being

The Salsa Timberjack Steel frameset is purpose-built for wide-tire adventure and winter riding, with a comfortable, stable ride and plenty of mounts for racks and fenders that make it a financial and practical favorite for bikepackers. Compared with the Karate Monkey it favors touring versatility over aggressive trail bias, and it typically undercuts premium trail frames on price while still accepting true plus tires.

  • Plus-ready clearance

  • Trail-smoothing geometry

  • Pack-hauler charm

  • Chromoly steel construction optimized for stability with plus tires.

  • Simple, efficient hardtail geometry that excels on mixed trails.

  • Plus-ready clearance

  • Trail-smoothing geometry

  • Pack-hauler charm

  • Chromoly steel construction optimized for stability with plus tires.

  • Simple, efficient hardtail geometry that excels on mixed trails.

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$800-1100 CAD

3
BEST MODERN GEOMETRY PLUS

Kona Unit X Frameset

Kona
🏠 Local Product

The Kona Unit X frameset offers a burly, confidence-inspiring steel platform engineered to handle heavy loads and aggressive singletrack with plus-tire compatibility and stout dropouts. It strikes a middle ground financially and technically—more trail-capable than touring-minded frames but generally more affordable than boutique race-focused steel frames like the Chromag Rootdown BA.

4.1
★★★★☆
  • Playful slackness

  • Plus-capable traction

  • Playful slackness

  • Plus-capable traction

Review Summary

82%

"Riders like the Kona Unit X for its tough steel build, confident handling, and solid value for plus‑tire setups, though some users report it feels heavy and less nimble than lighter alloy alternatives."

  • Snappy corner grin

  • Steel hardtail with modern, trail-focused geometry for confidence at speed.

  • Snappy corner grin

  • Steel hardtail with modern, trail-focused geometry for confidence at speed.

Skill Development & Mastery

Recreational Enjoyment

Enhanced Physical Well-Being

The Kona Unit X frameset offers a burly, confidence-inspiring steel platform engineered to handle heavy loads and aggressive singletrack with plus-tire compatibility and stout dropouts. It strikes a middle ground financially and technically—more trail-capable than touring-minded frames but generally more affordable than boutique race-focused steel frames like the Chromag Rootdown BA.

  • Playful slackness

  • Plus-capable traction

  • Snappy corner grin

  • Steel hardtail with modern, trail-focused geometry for confidence at speed.

  • Frame clearance designed to accept 27.5+ and many 29+ tyre options.

  • Playful slackness

  • Plus-capable traction

  • Snappy corner grin

  • Steel hardtail with modern, trail-focused geometry for confidence at speed.

  • Frame clearance designed to accept 27.5+ and many 29+ tyre options.

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$1000-1400 CAD

4
BEST HARDTAIL TRAIL PLUS

Norco Torrent S2 HT Frameset

Norco
🏠 Local Product

The Norco Torrent S2 HT frameset is a market-leader style hardtail that brings modern trail geometry, generous tire clearance for plus rubber, and high-end frame features such as tapered headtube and boost spacing for confident handling. It competes technically with the most aggressive options on this list—offering a more performance-oriented package than the Timberjack and a clearer focus on trail speed and stiffness versus the more comfort-oriented Surly.

4
★★★★☆
  • Stable-speed platform

  • Plus-friendly design

  • Stable-speed platform

  • Plus-friendly design

Review Summary

80%

"The Norco Torrent S2 HT is generally seen as a capable, well‑built hardtail that handles aggressive trail riding and plus tires satisfactorily; criticism centers on its weight and that the spec/geometry won't suit every rider seeking the latest trends."

  • Hard-charging confidence

  • Durable steel frame built for trail use and plus-tire compatibility.

  • Hard-charging confidence

  • Durable steel frame built for trail use and plus-tire compatibility.

Recreational Enjoyment

Skill Development & Mastery

The Norco Torrent S2 HT frameset is a market-leader style hardtail that brings modern trail geometry, generous tire clearance for plus rubber, and high-end frame features such as tapered headtube and boost spacing for confident handling. It competes technically with the most aggressive options on this list—offering a more performance-oriented package than the Timberjack and a clearer focus on trail speed and stiffness versus the more comfort-oriented Surly.

  • Stable-speed platform

  • Plus-friendly design

  • Hard-charging confidence

  • Durable steel frame built for trail use and plus-tire compatibility.

  • Balanced, trail-oriented geometry for predictable handling.

  • Stable-speed platform

  • Plus-friendly design

  • Hard-charging confidence

  • Durable steel frame built for trail use and plus-tire compatibility.

  • Balanced, trail-oriented geometry for predictable handling.

Order Now

$700-1000 CAD

5
BEST PREMIUM STEEL PLUS

Chromag Rootdown BA Frameset

Chromag
🏠 Local Product

The Chromag Rootdown BA frameset is a boutique, race-minded steel platform prized for immediate trail feedback, premium fit-and-finish, and optimized clearance for plus tires while retaining an agile, aggressive attitude. As a premium option it commands a higher price but delivers a technical riding edge and pared-down geometry that experienced riders will prefer over more utility-focused frames like the Timberjack or Karate Monkey.

4.6
★★★★☆
  • Bombproof steel feel

  • Root-loving traction

  • Bombproof steel feel

  • Root-loving traction

Review Summary

92%

"Owners consistently praise the Chromag Rootdown BA for its excellent steel ride quality, robust construction, and purposeful geometry for plus‑tire trail use, with the main drawbacks being its premium price and slightly heavier feel."

  • Enduro-ready smirk

  • High-quality chromoly tubing with refined, ride-tuned construction.

  • Enduro-ready smirk

  • High-quality chromoly tubing with refined, ride-tuned construction.

Recreational Enjoyment

Enhanced Physical Well-Being

The Chromag Rootdown BA frameset is a boutique, race-minded steel platform prized for immediate trail feedback, premium fit-and-finish, and optimized clearance for plus tires while retaining an agile, aggressive attitude. As a premium option it commands a higher price but delivers a technical riding edge and pared-down geometry that experienced riders will prefer over more utility-focused frames like the Timberjack or Karate Monkey.

  • Bombproof steel feel

  • Root-loving traction

  • Enduro-ready smirk

  • High-quality chromoly tubing with refined, ride-tuned construction.

  • Designed to clear large-volume plus tires for excellent traction.

  • Bombproof steel feel

  • Root-loving traction

  • Enduro-ready smirk

  • High-quality chromoly tubing with refined, ride-tuned construction.

  • Designed to clear large-volume plus tires for excellent traction.

Order Now

$1200-1700 CAD

What research and empirical testing say about plus tyres and steel frames

Laboratory tests and field research in bicycle dynamics and tyre mechanics help explain why plus tyres and steel frames perform the way they do on technical trails. Results consistently point to wider tyres increasing the contact patch and improving traction on loose surfaces, while steel frame characteristics and modern wheel standards influence comfort, durability and handling. Below are beginner-friendly summaries of those findings and practical trade-offs to consider.

Tire contact patch and traction: Wider tyres at appropriate pressures create a larger contact area with the ground, increasing grip on loose, sandy or snowy surfaces — improving cornering confidence and braking performance.

Pressure trade-offs: Lower tyre pressures increase traction and absorb small bumps, but can reduce efficiency on smooth surfaces and increase pinch-flat risk; plus tyres allow lower pressures with less rim impact.

Rim width and sidewall support: Wider rims support plus tyres better, maintaining sidewall shape for consistent cornering and reducing tyre squirm; rim-tire pairing matters more than tyre width alone.

Frame material effects: Steel exhibits material damping that tends to smooth high-frequency trail buzz and transmits less harsh vibration to the rider, improving perceived comfort on long or rough rides.

Hub spacing and wheel stiffness: Boost spacing and modern axle standards increase spoke bracing angles and wheel stiffness, which improves handling precision when using wider tyres and heavier trail loads.

Across Canada these plus-tire compatible steel framesets deliver a practical blend of traction, durability and comfort for technical trails and mixed-season riding. The five frames highlighted here — Surly Karate Monkey Frameset, Salsa Timberjack Steel Frameset, Kona Unit X Frameset, Norco Torrent S2 HT Frameset, and Chromag Rootdown BA Frameset — each bring different strengths for riders focused on float, agility or packing capability. For most Canadian riders seeking a balanced, trail-ready platform the Salsa Timberjack Steel Frameset stands out as the best all-around choice thanks to its modern geometry and clear plus-tire support. I hope you found what you were looking for — refine or expand your search using the site search to compare sizing, build options and local availability.

Discover More
  • Adventure Bikepacking Steel Framesets
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  • Custom Bespoke Steel Mountain Framesets
  • Chromoly Touring Steel Mountain Framesets
  • Modern Geometry Steel Mountain Framesets

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