The TIME ATAC XC 4 [paid link] pedals are designed for riders who value durability, efficient power transfer, and reliable engagement in all conditions. Known for their lightweight composite body and the signature ATAC (Auto Tension Adjustment Concept) system, these pedals are widely used among cross-country and gravel cyclists. However, achieving perfect compatibility within your drivetrain and shoe setup is essential for maximizing performance and avoiding premature wear or mechanical issues. This guide explains exactly what works with the ATAC XC 4 [paid link], what to avoid, and how to ensure your system runs smoothly from day one.
Understanding the TIME ATAC XC 4 Pedal System
The ATAC XC 4 is part of TIME’s mountain and gravel pedal line. It uses a dual-arch engagement system that provides consistent entry and release, even in muddy or dusty conditions. Its composite body and steel axle strike a balance between weight and durability. Unlike road-specific pedals, the ATAC XC 4 prioritizes float and mud clearance, making it a top choice for endurance riders and cyclocross racers who ride in variable terrain.
The system uses ATAC-specific cleats, which differ from Shimano SPD or Crankbrothers interfaces. This makes understanding compatibility crucial before installation or replacement.
Compatible Cleats and Why They Matter
The ATAC XC 4 is designed to work exclusively with TIME ATAC cleats [paid link]. These cleats are available in two main versions:
- TIME ATAC Easy Cleats – Offer a lower release angle (10°) for easier disengagement, ideal for beginners or riders who frequently unclip.
- TIME ATAC Standard Cleats – Provide a higher release angle (13° or 17°, depending on mounting orientation) for more secure retention during aggressive riding.
Using any non-TIME cleat system will result in improper engagement and can damage both the pedal and shoe interface. SPD cleats, for instance, might appear to fit initially but can deform the retention bars or cause unsafe release behavior. Riders should also ensure the cleats are properly aligned to match their natural foot angle, as the ATAC system provides 5° of angular float and 6mm of lateral float, allowing comfortable pedaling biomechanics.
Compatible Shoes: SPD-Compatible Soles Only
TIME ATAC XC 4 pedals are designed for two-bolt SPD-style shoe mounts. Most XC, gravel, and trail shoes support this configuration. However, it’s important to note the following:
- Compatible: MTB shoes with a two-bolt recessed cleat pattern (e.g., Shimano XC, Giro, Sidi MTB, Fizik Terra series).
- Not compatible: Road shoes with a three-bolt pattern (e.g., Look, SPD-SL, or Speedplay).
Shoes with minimal tread clearance around the cleat pocket may cause interference with the pedal body. Before riding, test clip-in engagement off the bike to ensure smooth entry and full float movement. If the tread contacts the pedal wings, slight trimming of the sole lugs may be necessary to achieve optimal clearance.
Crank Arm Compatibility
The ATAC XC 4 pedals feature a 9/16” x 20 TPI (threads per inch) spindle, which is the standard size for almost all modern cranksets. The steel axle is strong enough for use on both aluminum and carbon crank arms. However, proper installation torque and thread preparation are critical.
- Always apply a thin layer of grease or anti-seize compound to the threads before installation.
- Tighten to the manufacturer’s recommended torque: 35–40 Nm.
- Avoid using pedal washers unless the crank arm design requires them for proper spacing.
Cranksets from Shimano, SRAM, Race Face, and FSA are fully compatible. However, note that some power meter cranks (such as SRM or pedal-based meters) may require specific clearance checks due to slightly thicker crank arms.
Chainset and Q-Factor Considerations
The TIME ATAC XC 4 pedals have a Q-factor of 54.1mm, a common standard for cross-country and gravel setups. This provides a neutral stance width compatible with most modern drivetrains. Riders switching from road systems should note that this Q-factor is slightly wider than typical road pedals, offering better stability off-road but potentially altering knee alignment if not properly adjusted.
If riders experience knee discomfort or tracking issues, a minor cleat position adjustment—moving the cleat inward or outward—can correct alignment and restore optimal biomechanics.
Cleat Mounting Hardware and Shoe Compatibility Tips
TIME provides high-quality steel mounting bolts and shims with every new pair of cleats. Always use these components, as the thread pitch and bolt head shape are specifically designed for ATAC systems. Substituting hardware can lead to uneven torque or stripped threads in the shoe sole.
When mounting:
- Apply a small amount of threadlocker (medium strength) to the bolts.
- Tighten evenly to 5–6 Nm using a 4mm hex key.
- After the first few rides, recheck bolt torque—cleats can settle slightly into the sole.
What Fails: Common Compatibility Mistakes
Several issues can arise from using incompatible or incorrectly installed components. These include:
- Using SPD or Crankbrothers cleats: The interface shape differs and can cause the ATAC retention bars to deform.
- Three-bolt road shoes: These will not accept ATAC cleats [paid link] at all.
- Neglecting to check tread interference: Excess rubber contact restricts float and may cause accidental release.
- Mixing cleat generations: Older ATAC cleats (pre-2016) may have a different release angle and are not recommended for use with current XC 4 models.
Riders who overlook these points risk poor engagement, noisy pedaling, or even mechanical failure during rides.
What Works Best: Proven Setup Recommendations
For optimal performance, the TIME ATAC XC 4 pedals perform best when paired with:
- TIME ATAC Easy or Standard Cleats (current generation)
- High-quality MTB shoes with a recessed two-bolt interface
- Crank arms with a standard 9/16” thread and proper spacing
- Appropriate cleat alignment to maintain natural knee tracking
This combination ensures a smooth, reliable clip-in/out action and consistent power transfer under all conditions.
Compatibility with Other TIME Pedals
TIME ATAC cleats are cross-compatible across all ATAC models (XC, MX, and Enduro series). However, they are not compatible with the TIME XPRO or XPRESSO road pedal lines, which use a different engagement platform and cleat shape. Riders switching between gravel and mountain bikes using ATAC-based pedals can keep a single set of shoes without changing cleats, simplifying multi-bike setups.
Conclusion
The TIME ATAC XC 4 pedals deliver robust performance and exceptional mud-clearing ability, but achieving full efficiency depends heavily on correct compatibility choices. Use only TIME ATAC cleats, mount them on two-bolt MTB shoes, and verify crank clearance before installation. Avoid mixing systems or outdated cleats, as they compromise both engagement reliability and pedal longevity. When installed and maintained correctly, the ATAC XC 4 system offers one of the most secure and natural-feeling interfaces available in the cross-country and gravel categories.