AI quick summary
- Trek is the largest US-owned bike brand (still family-owned by the Burke family). They build their own carbon frames at their Waterloo, Wisconsin headquarters — the OCLV (Optimum Compaction Low Void) process is Trek's in-house carbon manufacturing standard, developed in 1992
- Road hierarchy: Madone (aero race) → Émonda (lightweight climbing) → Domane (endurance with IsoSpeed). Trek is the only major brand to keep a dedicated aero bike (Madone) and a dedicated lightweight bike (Émonda) as separate platforms, while Specialized and Giant have consolidated into one
- Gravel: Checkpoint SL (carbon) and Checkpoint ALR (alloy). Clearance up to 45 mm (700c) / 2.0" (650b). The Checkpoint has the most mounting points of any gravel bike — 8 total (bottles, racks, fenders, anything cages)
- MTB: Fuel EX (trail, 140/130 mm) is the volume seller; Top Fuel (XC, 120/115 mm) for racing; Slash (enduro, 170/160 mm); Supercaliber (XC marathon, 80 mm IsoStrut). The Supercaliber's IsoStrut — a strut integrated into the top tube — is Trek's signature XC innovation
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OCLV carbon grades — 800, 700, 500, 120 Series
Trek's OCLV (Optimum Compaction Low Void) carbon grades. Higher series = lighter and stiffer. 'Series' replaced the old OCLV 55/110/700 naming.
| Grade | Layup | Weight class | Found on | Made in |
|---|---|---|---|---|
| OCLV 800 | Premium high-modulus, hand-laid | Lightest (Émonda SLR ≈690 g frameset) | Madone SLR, Émonda SLR, Domane SLR, Supercaliber | Waterloo, WI (USA) |
| OCLV 700 | High-modulus, automated + hand-finish | ≈150–200 g heavier than 800 | Madone SL 7, Émonda SL, Domane SL, Fuel EX, Slash | Waterloo, WI (USA) |
| OCLV 500 | Standard-modulus, value carbon | ≈300–400 g heavier than 800 | Madone SL 6, Émonda SL 5, Domane SL, Checkpoint SL | Waterloo, WI (USA) |
| OCLV 120 / Alpha | Alloy with butted tubing | Heaviest, entry-level | Checkpoint ALR, Domane AL, Marlin, Roscoe | Asia (contract) |
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Road — Madone, Émonda, Domane
Madone Gen 8 (2023–present): Trek's aero race bike. The defining feature is IsoFlow — a hole through the seat tube and seatpost that lets air flow through the frame, reducing drag from the rider's body wake. The Gen 8 also added tire clearance to 30 mm (from 28 mm) and an integrated one-piece cockpit. The frame is heavier than the Émonda (≈780 g vs 690 g) because the aero shapes require more material.
Émonda: Trek's lightweight climbing bike. No aero optimization — just round tube shapes and the lightest possible structure. At 690 g (SLR, size 56), it's competitive with the Specialized Aethos. The Émonda was Trek's first sub-700 g production disc frame (2021).
Domane: Trek's endurance bike, with IsoSpeed — Trek's signature compliance tech. IsoSpeed is a decoupler at the seat tube/top tube junction that allows the seatpost to flex independently of the frame. The Domane SLR has both front (steerer) and rear (seat tube) IsoSpeed; the SL has rear only. The result: a bike that smooths cobbles and rough roads while remaining efficient. Tire clearance is 38 mm — enough for light gravel.
Trek road family. Unlike Specialized and Giant, Trek keeps three distinct road platforms: aero, lightweight, endurance.
| Model | Category | Frame grade | Key feature | Tire clearance | Starting price |
|---|---|---|---|---|---|
| Madone SLR (Gen 8) | Aero race | OCLV 800 | IsoFlow (aero seat tube cutout), ≈780 g frameset, fully integrated cockpit | 30 mm | ≈$12,000 (Madone SLR 9) |
| Madone SL 7 Gen 8 | Aero race | OCLV 700 | Same IsoFlow aero; Ultegra Di2; integrated cockpit | 30 mm | ≈$6,500 |
| Madone SL 6 Gen 8 | Aero race | OCLV 500 | Same aero frame; 105 Di2; the aero entry point | 30 mm | ≈$4,500 |
| Émonda SLR | Lightweight climbing | OCLV 800 | ≈690 g frameset, no aero optimization, round tubes | 32 mm | ≈$9,000 (Dura-Ace Di2) |
| Émonda SL | Lightweight climbing | OCLV 700 | Same geo as SLR; heavier layup; Ultegra Di2 | 32 mm | ≈$5,500 |
| Domane SLR | Endurance (IsoSpeed) | OCLV 800 | Front + rear IsoSpeed, 38 mm tire clearance, ≈950 g frameset | 38 mm | ≈$9,500 (Ultegra Di2) |
| Domane SL | Endurance (IsoSpeed) | OCLV 500/700 | Same IsoSpeed; 105 Di2 or Ultegra; endurance entry carbon | 38 mm | ≈$3,500 |
| Domane AL | Endurance (alloy) | Alpha alloy | No IsoSpeed; entry-level endurance; Shimano Tiagra/105 | 35 mm | ≈$1,300 |
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IsoSpeed — Trek's compliance tech
Rear IsoSpeed: a pivot at the seat tube/top tube junction. The seat tube can rotate slightly fore/aft around this pivot, allowing the seatpost to flex more than the frame alone. The effect: 10–15 mm of effective vertical compliance without the pedaling penalty of a suspension.
Front IsoSpeed: a similar decoupler at the steerer tube/crown junction on Domane SLR. The fork can rotate slightly fore/aft. Combined with rear IsoSpeed, the Domane SLR smooths both ends.
Tunable IsoSpeed: on Domane SLR, the rear IsoSpeed has a dial that adjusts the pivot stiffness (soft/medium/firm). Softer for cobbles, firmer for efficiency. The Domane SL has a fixed (non-tunable) IsoSpeed.
IsoStrut: a different tech, found on the Supercaliber XC bike. It's a strut integrated into the top tube that provides 80 mm of rear suspension travel. The seatstays flex to provide the travel; the strut damps it. It's the lightest full-suspension XC frame on the market.
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Gravel — Checkpoint
The Checkpoint is Trek's gravel platform, now in its third generation (2022 redesign). It's the most mount-point-rich gravel bike: 3 bottle cage mounts (down tube, seat tube, underside), 2 Anything Cage mounts on the fork, 1 top tube mount, 1 rear rack mount, and full fender mounts. For bikepacking, no production gravel bike has more storage options.
Geometry: the Checkpoint sits between the endurance Domane and a dedicated gravel race bike. The stack/reach is moderate (not as upright as the Diverge, not as low as the Tarmac). The chainstay length is adjustable via a flip-chip — short (425 mm) for agility, long (435 mm) for stability with bags.
Stranglehold dropout: the Checkpoint uses Trek's proprietary thru-axle system with adjustable position. The flip-chip moves the axle 5 mm fore/aft, changing the wheelbase and handling. Both 700c and 650b wheels fit with the same frame.
Checkpoint gravel family. The most mount-point-heavy gravel bike: 8 total (3 bottle, 2 fork, 1 top tube, 1 rack, 1 fender).
| Model | Frame grade | Groupset options | Tire clearance | Starting price |
|---|---|---|---|---|
| Checkpoint SLR | OCLV 800 | SRAM Red AXS XPLR or Shimano GRX Di2 | 45 mm (700c) / 2.0" (650b) | ≈$8,000 |
| Checkpoint SL (7) | OCLV 700 | GRX Di2 or Force AXS XPLR | 45 mm (700c) / 2.0" (650b) | ≈$5,500 |
| Checkpoint SL (6) | OCLV 500 | GRX RX820 or Rival AXS XPLR | 45 mm (700c) / 2.0" (650b) | ≈$3,500 |
| Checkpoint ALR | Alpha alloy | GRX RX610 / Apex XPLR | 45 mm (700c) / 2.0" (650b) | ≈$2,000 |
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Mountain — Fuel EX, Top Fuel, Slash, Supercaliber
Fuel EX Gen 6 (2023–present): Trek's flagship trail bike and the volume seller. 140 mm front / 130 mm rear travel, Mino Link adjustable geometry (2 settings: high/low BB and head angle), and ABP (Active Braking Pivot — the rear pivot is concentric with the rear axle, so the suspension stays active under braking). The Gen 6 moved to a mixed-wheel (MX) default with a 29" front and 27.5" rear; full 29" is still available as an option.
Top Fuel: Trek's XC and down-country bike. 120 mm front / 115 mm rear — more travel than a pure XC race bike (which is typically 100 mm), but lighter and more efficient than a trail bike. The Top Fuel is the 'one bike' for riders who race XC occasionally but ride trail the rest of the time. It's the direct competitor to the Specialized Epic 8 and Giant Anthem.
Slash: Trek's enduro bike. 170 mm front / 160 mm rear, slack (63.5° head angle), long reach, designed for enduro racing and bike park. The ABP suspension is tuned for big-hit absorption. Available with coil or air shocks depending on trim.
Supercaliber Gen 2 (2024): Trek's XC marathon race bike. The IsoStrut — a strut integrated into the top tube — provides 80 mm of rear travel. The seatstays flex to provide the travel; the strut damps it. The result: a frame that weighs ≈1,800 g (lighter than most hardtails) with 80 mm of suspension. It's the bike that won the 2023 XC World Championships.
Trek MTB family. All full-suspension models use ABP (Active Braking Pivot).
| Model | Category | Travel (F/R) | Wheel size | Suspension | Starting price |
|---|---|---|---|---|---|
| Fuel EX (Gen 6) | Trail | 140 / 130 mm | MX (29 F / 27.5 R) or 29" | ABP + Mino Link adjustable geo | ≈$4,500 (Fuel EX 7) |
| Top Fuel | XC / down-country | 120 / 115 mm | 29" | ABP, shorter travel, lighter | ≈$4,000 (Top Fuel 7) |
| Slash | Enduro | 170 / 160 mm | MX (29 F / 27.5 R) | ABP, slack (63.5° head) | ≈$5,000 (Slash 7) |
| Supercaliber | XC marathon | 100 / 80 mm (IsoStrut) | 29" | IsoStrut (strut in top tube) | ≈$7,000 (Supercaliber Gen 2) |
| Roscoe | Budget trail hardtail | 140 mm (F only) | 27.5+ or 29" | No rear suspension | ≈$1,800 |
| Marlin | Entry XC hardtail | 100 mm (F only) | 29" or 27.5" | No rear suspension | ≈$700 |
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ABP and Mino Link — Trek's suspension tech
ABP (Active Braking Pivot): the rear suspension pivot is concentric with the rear axle (on the chainstay, not the seatstay). This means the suspension stays active under braking — the wheel can track the ground even when you're hard on the brakes. ABP is on all Trek full-suspension bikes.
Mino Link: a flip-chip on the upper shock link that changes the geometry. Two settings: 'High' (steeper head angle, higher BB, more agile) and 'Low' (slacker head angle, lower BB, more stable). Found on Fuel EX, Slash, and Top Fuel. No tools needed — just an Allen key to flip the chip.
Knock Block: a headset system that limits the steering rotation to prevent the fork crown from hitting the downtube. Found on most Trek MTB and gravel bikes. Reduces the turning circle slightly but protects the frame in a crash.
Straight Shot: a wide, unobstructed down tube on Trek road and gravel bikes. Improves airflow through the frame and provides internal cable routing space. Found on Madone, Émonda, Domane, and Checkpoint.
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Trek model naming — how to decode
Trek's naming convention: [Model] [Frame Grade] [Trim Number] [Year]. Examples:
• Madone SLR 9 Gen 8 — SLR frame grade (OCLV 800), Trim 9 (top spec), Generation 8 frame.
• Fuel EX 7 Gen 6 — EX trail model, Trim 7 (mid-spec), Generation 6 frame.
• Checkpoint SL 6 — SL frame grade (OCLV 500/700), Trim 6 (mid-spec).
Frame grades: SLR = OCLV 800 (top), SL = OCLV 500/700 (mid), AL = Alpha alloy (entry). Trim numbers run from 3 (entry) to 9 (top). Higher trim = better groupset and wheels, same frame.
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