SURLY DP1002 Singleator Up Spring Pulley Bike TP91-7 70G
( Brand: Surly ), ( Manufacturer Part Number: DP1002 ), ( Part Type: Pulley Bike Pull ), ( Compatible Bike Type: Single Speed/fixie ), ( Color: Silver ), ( Material: Aluminum Alloy, Steel ), ( Country Of Origin: Taiwan )
Review SURLY Singleator Pull up Spring Parts Lot Pulley 70g Bike
The **Surly Singleator Pull-Up Spring Pulley (TP91-7, 70g)** is a meticulously engineered, ultra-lightweight accessory designed to transform any standard bicycle into a seamless single-speed or fixed-gear rig with minimal effort. Crafted from high-grade, corrosion-resistant materials, this spring-loaded pulley system eliminates the need for complex derailleur setups, making it an ideal solution for riders seeking simplicity, durability, and effortless shifting whether for urban commuting, track days, or off-road adventures. Weighing just **70 grams**, the Singleator is a featherweight marvel, ensuring it doesn t compromise the bike s agility or handling, even on long rides. Its **TP91-7** designation indicates a precise 70mm pulley diameter, optimized for smooth operation with a wide range of chain sizes, from standard 1/8" to 3/32" links, making it versatile for both new and retrofitted bikes. The spring mechanism is housed in a robust, anodized aluminum housing, providing both strength and a sleek, low-profile design that blends seamlessly with the frame. Unlike traditional derailleurs, the Singleator s **pull-up activation** allows riders to shift gears with a simple upward motion on the brake lever, reducing hand fatigue and streamlining the riding experience. Whether you're a fixed-gear enthusiast looking to ditch the derailleur or a mountain biker seeking a lightweight, no-fuss solution for a single-speed conversion, the Surly Singleator delivers unmatched performance with minimal maintenance. Its **durable construction, precision engineering, and lightweight design** make it a standout choice for riders who demand reliability without compromise. Perfect for custom builds, retrofitting older bikes, or simply embracing the purity of a single-speed ride, the Surly Singleator is more than just a pulley it s a gateway to a cleaner, more efficient cycling experience.
The **Surly DP1002 Singleator Pull-Up Spring Pulley (TP91-7, 70g)** is a popular choice for riders who want a lightweight, efficient, and versatile rear derailleur for single-speed or fixed-gear bikes. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.
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### **Pros**
1. **Lightweight Design**
- Weighs only **70g**, making it one of the lightest rear derailleurs available. This is ideal for fixed-gear, track, or lightweight single-speed setups where weight matters.
2. **Spring Pulley System**
- The **spring-loaded pulley** provides smooth, consistent chain tension, reducing the need for frequent adjustments. This is particularly useful in fixed-gear riding where chain tension can vary significantly.
3. **Compact and Clean Aesthetic**
- The **minimalist design** fits well on both retro and modern bikes. It s often preferred for aesthetic reasons, especially on fixed-gear or track bikes where simplicity is key.
4. **Good for Fixed-Gear and Single-Speed**
- Works well with **fixed-gear setups** due to its ability to handle chain tension fluctuations. It s also a solid choice for **single-speed bikes**, though it may not be as durable as heavier derailleurs for heavy-duty use.
5. **Easy Installation and Adjustment**
- The **simple design** makes it straightforward to install and adjust. Most riders can set it up without professional help.
6. **Durable for Light Use**
- While not built for extreme off-road or heavy-duty use, it holds up well for **urban commuting, track riding, or casual single-speed use**.
7. **Compatibility with Various Drivetrains**
- Works well with **Shimano, SRAM, and Campagnolo** chains and cassettes (though it s primarily designed for single-speed or fixed-gear setups).
8. **Low Maintenance**
- Requires minimal lubrication and adjustment compared to heavier derailleurs, making it ideal for riders who prefer low-maintenance setups.
---
### **Cons**
1. **Not Suitable for Multi-Speed Use**
- The **Singleator is designed exclusively for single-speed or fixed-gear bikes**. It lacks the necessary components (e.g., jockey pulleys, derailleur body) to handle multiple gears, making it useless for road or mountain bikes with multiple cogs.
2. **Limited Chain Line Adjustment**
- Unlike traditional derailleurs, the **Singleator has no adjustable chain line**. If your bike s chain line isn t perfect, the derailleur may not perform optimally, leading to chain rub or poor shifting (though shifting isn t an issue in single-speed).
3. **Less Durable for Heavy Use**
- While sturdy for light use, it s **not built for rough terrain, heavy loads, or aggressive riding**. The lightweight design means it may wear out faster under extreme conditions.
4. **No B-Tension Adjustment**
- Unlike most derailleurs, the **Singleator lacks a B-tension screw**, which can make fine-tuning chain tension more difficult. This is less of an issue in fixed-gear but can be a nuisance in single-speed setups.
5. **Limited Availability of Spare Parts**
- Since it s a niche product, **replacement parts (e.g., springs, pulleys) may be harder to find** compared to mainstream derailleurs.
6. **Not Ideal for Long-Term Heavy Use**
- Over time, the **spring pulley can wear out**, especially if the chain is poorly maintained or if the bike is ridden aggressively. This may require replacement sooner than heavier derailleurs.
7. **Higher Cost Relative to Basic Single-Speed Derailleurs**
- While **70g is lightweight**, some basic single-speed derailleurs (like the **Shimano Tourney or SRAM PG-950**) are cheaper and still functional for most casual riders.
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### **Conclusion**
The **Surly DP1002 Singleator** is an **excellent choice** if you re building a **lightweight fixed-gear or single-speed bike** and prioritize aesthetics, minimalism, and smooth chain tension. Its **spring pulley system** makes it a great fit for fixed-gear riding, where chain tension can fluctuate. However, it s **not suitable for multi-speed bikes**, rough terrain, or heavy-duty use.
If you re a **fixed-gear enthusiast, track rider, or someone who wants a clean, lightweight single-speed setup**, this derailleur is a **solid investment**. On the other hand, if you need **durability, adjustability, or multi-speed capability**, you may want to consider a **heavier, more robust derailleur** (e.g., **Shimano Tourney, SRAM PG-950, or a track-specific derailleur**).
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### **Recommendation**
- **Buy the Surly DP1002 Singleator if:**- You re building a **fixed-gear or lightweight single-speed bike**.
- You prefer a **minimalist, lightweight, and aesthetically pleasing** derailleur.
- You ride mostly on **pavement or smooth surfaces** and don t need heavy-duty durability.
- You want **smooth chain tension** without frequent adjustments.
- **Avoid the Surly DP1002 Singleator if:**- You need a **multi-speed derailleur** (even for a second chainring).
- You ride **aggressively on rough terrain** or carry heavy loads.
- You want **more adjustability or a heavier, more durable** derailleur.
- You re on a tight budget and can find a **basic single-speed derailleur** for less.
For most **fixed-gear riders**, the **Surly Singleator is a fantastic choice** it s lightweight, reliable, and fits the retro aesthetic perfectly. For **single-speed commuters or casual riders**, a **heavier but more durable derailleur** (like the **Shimano Tourney or SRAM PG-950**) may be a better long-term option.
Details:
Mixed Surly Singleator pull-up spring parts lot with several springs still sealed in labeled PE:LD bags and other pieces loose from packaging. Surly Singleator pull-up spring and hardware lot for single-speed or fixed-gear drive trains. Included items: multiple pull-up springs, two silver guide plates, one black pulley wheel, and spacer collar as pictured. Material and construction: silver aluminum alloy guide plates with steel coil springs black composite pulley spacer.
Part type: bracket riser and small parts kit for Surly Singleator chain pensioner. MPN: DP1002 TP91-7, UPC. Listing includes only the Surly Singleator parts lot; scale, ruler, and any other background items are not included. Logos and markings: bag labels printed DP1002 TP91-7 Singleator Pull Up Spring with PE:LD Made in Taiwan text.
Surly Singleator Pull-Up Spring Parts Lot Pulley DP1002 TP91-7 70g Bike. Compatibility: designed for Surly Singleator pensioners on single speed or fixie bicycle setups.
part #: dp1002 price
- $34.99
specifications ribicycl:
- brand: Surly
- mpn: Dp1002
- part type: Pulley Bike Pull
- compatible bike type: Single Speed/fixie
- color: Silver
- material: Aluminum Alloy, Steel
- country of origin: Taiwan
shipping ribicycl:
- service: Standard, Expedited
- type: Fixed
- cost: $5.95
- class: Standard, Expedited
- transit: 4-7 Days
payments ribicycl:
- wallet: Google-pay
- other
- credit card: Diners-club
returns ribicycl:
- policy: Returns Accepted
- method: Money back
- time: 60 Days
- paid by: Seller
general ribicycl:
- Cycling > Bicycle Components Parts > Other Bike Components Parts
- condition: Used
seller ribicycl:
- rating: 100.0%
- # reviews: 34948
- city: Neenah, Wisconsin
offer ribicycl:
- availability: In Stock
- best offers: True
- started: May 9, 2026
- quantity: 1
- sold: 0
- options: Ship-to-home
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