The Shimano PD-6700[paid link] Ultegra pedals have long been favored by road cyclists for their durability, reliability, and efficient power transfer. However, the introduction of the PD-6800 model brought a series of refinements that left many riders wondering whether the upgrade is worthwhile. This detailed guide examines the key differences between the PD-6700[paid link] and PD-6800 pedals, focusing on performance, design, maintenance, and long-term usability to help you make an informed decision.
Design and Construction Quality
The Shimano PD-6700 pedals feature a lightweight aluminum body with a stainless-steel wear plate, providing a balance between stiffness and corrosion resistance. The construction reflects Shimano’s attention to engineering precision, ensuring consistent engagement and long-term reliability.
In comparison, the PD-6800 pedals adopt a similar platform design but with subtle improvements in material composition. Shimano reduced the weight slightly by refining the carbon composite body, creating a more efficient structure without compromising strength. Additionally, the PD-6800 introduced a wider contact area to enhance power transfer and foot stability, especially during intense sprints or climbs.
Overall, while both models deliver excellent rigidity and pedaling efficiency, the PD-6800 offers a more refined interface and a marginally lighter construction.
Axle and Bearing System
Both the PD-6700 and PD-6800 pedals use a durable stainless-steel spindle with a sealed cartridge bearing system. The PD-6700’s axle design prioritizes smooth rotation and long service intervals, ideal for riders who cover high mileage with minimal maintenance.
The PD-6800 improves upon this foundation with enhanced sealing against contaminants. Shimano slightly re-engineered the bearing assembly, using tighter tolerances to minimize play and improve bearing longevity. As a result, PD-6800 pedals often remain smoother over time, especially when exposed to wet or gritty conditions.
However, from a service standpoint, both models are fully rebuildable. Replacement bearing kits and axles remain available, allowing experienced mechanics to extend the lifespan of either pedal significantly.
Cleat Interface and Engagement Feel
Engagement and release feel are critical in pedal performance. The PD-6700 employs Shimano’s SPD-SL cleat system, offering predictable entry and release with adjustable tension settings. Its engagement is firm and mechanical, favored by riders who appreciate tactile feedback when clipping in.
The PD-6800, on the other hand, refined this interface. Shimano reduced friction at the contact points, leading to smoother engagement and a slightly lighter release feel. For riders who frequently dismount or navigate stop-and-go conditions, this adjustment translates to improved comfort and confidence.
Despite these differences, both models use the same SPD-SL cleats (SM-SH10[paid link], SM-SH11[paid link], and SM-SH12[paid link]), ensuring full backward and forward compatibility. This means upgrading between models does not require new shoes or cleats.
Weight Comparison
Weight is often a deciding factor for performance-focused cyclists. The Shimano PD-6700 pedals weigh approximately 260 grams per pair, while the PD-6800 pedals come in at about 248 grams. Although the difference is modest, weight savings at the pedal level contribute to a marginal improvement in overall bike efficiency and climbing performance.
For competitive riders seeking every advantage, the PD-6800’s lighter composite structure offers a slight edge. However, for training or endurance riders, the PD-6700 remains a perfectly efficient and cost-effective option.
Performance Under Load
Under high torque conditions, such as sprinting or climbing, both pedals deliver excellent stability and power transfer. The PD-6700’s aluminum body provides a firm, predictable platform that resists flex. The PD-6800’s wider base and improved carbon structure further enhance this stability, distributing force more evenly across the shoe sole.
In practical terms, the PD-6800 offers a marginally more connected feel, especially noticeable when accelerating from a seated position. This refinement makes it the preferred choice for competitive cyclists aiming for peak power efficiency.
Maintenance and Serviceability
The PD-6700 pedals are well-regarded for their ease of maintenance. The axle assembly can be removed using Shimano’s TL-PD40 tool, allowing for full cleaning and re-greasing. With proper care, these pedals can last tens of thousands of kilometers without performance degradation.
The PD-6800 retains the same maintenance approach but with improved sealing at the bearing interface. This small but significant upgrade helps reduce the frequency of servicing, especially in wet environments. Nevertheless, both models should be inspected periodically for play, seal wear, and bearing noise to ensure continued smooth operation.
Durability and Longevity
When properly maintained, both the PD-6700 and PD-6800 are capable of withstanding years of intensive use. The stainless-steel wear plates protect against cleat abrasion, maintaining engagement quality even after thousands of clip-ins.
However, the PD-6800’s composite material tends to show cosmetic wear more quickly than the PD-6700’s metallic finish. Despite this, the structural integrity remains unaffected, meaning visual wear does not compromise performance.
Aesthetic and Ergonomic Updates
From an aesthetic standpoint, the PD-6700 features a silver and metallic finish, aligning with Shimano’s Ultegra 6700 groupset theme. The PD-6800 transitions to a darker, matte look that complements the Ultegra 6800 series and modern bike color schemes.
Shimano also slightly modified the pedal’s shape, creating a smoother contour that enhances shoe clearance and improves cornering safety. This ergonomic refinement benefits riders who lean aggressively into turns or use wider shoes.
Value for Money
In today’s market, PD-6700 pedals are typically found at lower prices due to discontinuation. They continue to offer excellent value for recreational and endurance cyclists seeking high performance at a reduced cost.
The PD-6800, being newer and lighter, often commands a higher price. However, for riders prioritizing incremental gains in smoothness, engagement, and longevity, the extra investment is justified.
Ultimately, the decision depends on your priorities—cost efficiency or performance refinement.
Compatibility and Upgrade Considerations
Both pedal models are compatible with all Shimano SPD-SL cleats and cranksets. Riders upgrading from PD-6700 to PD-6800 do not need to replace shoes, cleats, or other drivetrain components.
However, those considering future upgrades toward Shimano’s R8000 or R9100 series will find the PD-6800 more aesthetically and mechanically aligned, offering a smoother transition.
Conclusion
The Shimano PD-6700 pedals remain an excellent choice for durability, consistency, and ease of maintenance. They deliver professional-level performance that satisfies the needs of most riders. However, the PD-6800 refines nearly every aspect—from engagement feel to sealing and weight—making it a better long-term option for competitive cyclists.
In summary, if you value reliability and cost-effectiveness, the PD-6700 pedals are still a top-tier option. If you prefer smoother operation, marginally lower weight, and improved sealing, the PD-6800 pedals represent a worthwhile upgrade. Both embody Shimano’s commitment to precision engineering and performance excellence on the road.