Shimano TOURNEY MF-TZ510 7-Speed Freewheel 14–28 (No Spoke Protector) | Reliable Black Steel Cogs

Product Overview

Upgrade your 7-speed drivetrain with the Shimano TOURNEY MF-TZ510 7-Speed Freewheel 14–28 (No Spoke Protector). This freewheel features seven durable black steel cogs arranged in a 14-16-18-20-22-25-28 tooth configuration. Designed for entry-level mountain, hybrid, and commuter bikes, the MF-TZ510 delivers smooth shifting, reliable performance, and corrosion resistance in wet Irish conditions. Its thread-on design installs onto any standard 7-speed hub without a spoke protector.

Key Features

• Seven Steel Cogs: 14-16-18-20-22-25-28 teeth for a wide gear range, ideal for steep Dublin climbs and fast canal-side flats.
• Black Steel Construction: Durable, corrosion-resistant finish stands up to rain and grit on Irish roads.
• Smooth Shifting: Precision machining ensures consistent, reliable shifts under load.
• 7-Speed Compatibility: Works with Shimano Tourney/Tourney TZ rear derailleurs and HG/IG 6/7/8-speed chains.
• Thread-On Design: Standard 14 mm x 1.0 mm thread fits any threaded 7-speed hub—no spoke protector needed.
• Compact Weight: Approximately 375 g, balancing strength with manageable weight for everyday riding.

Why Dublin Riders Choose It

Whether you’re navigating Temple Bar’s cobbles or tackling Killiney Hill, the MF-TZ510’s 14–28 T spread provides low gears for climbs and mid-range steps for cruising flat canal paths. Irish commuters and weekend hobbyists trust this freewheel for trouble-free performance at an affordable price.

Technical Specifications

• Manufacturer SKU (MPN): MF-TZ510
• Gear Teeth: 14-16-18-20-22-25-28
• Number of Speeds: 7
• Material: Black steel cogs, alloy carrier
• Weight: ~375 g
• Compatibility: Shimano Tourney/TZ derailleurs; HG/IG 6/7/8-speed chains
• Mount Type: Thread-on freewheel (14 mm x 1.0 mm thread), no spoke protector
• Color: Black (cogs), silver (carrier)
• Country of Manufacture: Taiwan

Usage Recommendations

Entry-Level Mountain Bikes

Ideal for hardtails or basic full-suspension bikes on Wicklow’s gravel trails. The 14–28 T range helps you conquer loose climbs and maintain momentum on rolling terrain.

Hybrid & Commuter Bikes

Perfect for daily commutes in Dublin. Use lower gears to tackle Cemetery Road or Daingean Road hills, and shift up for fast rides along the Royal Canal Cycle Route. The black steel finish stands up to frequent rain and road debris.

Recreational & Leisure Rides

Great for weekend spins around Phoenix Park or casual tours along coastal routes. Pair with a Shimano Tourney TZ derailleur and CN-HG40 chain for smooth, quiet shifting over mixed surfaces.

Replacement & Upgrade

Swap a worn freewheel or upgrade from a narrow-range model. The MF-TZ510’s wider spread reduces cross-chaining and improves cadence options. Apply a light grease to freewheel threads before installing to prevent seizing.

Recommended Accessories & Complementary Items

• Shimano CN-HG40 7-Speed Chain: Ensures crisp shifts and extended drivetrain life.
• Shimano Tourney TZ Rear Derailleur (RD-TZ50 or RD-TZ500): Provides reliable indexing for 7-speed setups.
• Freewheel Removal Tool: Park Tool FR-5 and chain whip to remove and install the freewheel safely.
• Chain Whip Tool: Holds the freewheel stationary while using the removal tool.
• Rear Wheel Service Kit: Includes grease and cone wrenches for bearing maintenance before installing the new freewheel.
• Drivetrain Cleaning Kit: Brushes and degreaser to keep cogs, chain, and pulleys clean—improves shifting performance.

Tips & Tricks

• Grease Threads: Lightly grease hub threads before installing to prevent seizing and ease future removal.
• Tighten Correctly: Hand-tight plus a quarter-turn with a freewheel tool is usually sufficient—avoid over-torquing to protect hub threads.
• Chain Compatibility Check: Use an HG-compatible 7-speed chain like CN-HG40. A properly sized chain ensures smooth engagement across all cogs.
• Inspect Cog Wear: Look for “shark-tooth” profiles on each cog—replace the freewheel and chain together if teeth appear hooked to prevent skipping.
• Adjust B-Screw: When installing a wider freewheel, set the derailleur B-screw so the upper pulley clears the largest cog by 5–6 mm.
• Test Ride & Re-Check: After installation, ride through all gears, then re-check freewheel tightness and derailleur indexing for optimal performance.

Why Choose Pedro Pedals?

Based in Dublin 8, Pedro Pedals is your go-to shop for bike accessories, spare parts, and new or used bicycles across Ireland. We offer fast asphalt delivery nationwide—so whether you’re in Dublin or Cork, you’ll receive your Shimano TOURNEY MF-TZ510 quickly and securely.

Our friendly, human-first service caters to hobbyists, commuters, and pro riders alike. We know every hill and lane across Dublin and beyond—let us help you choose the best drivetrain upgrade for your riding style. Ride smoother, ride longer, and ride with confidence at Pedro Pedals.

Ready to Upgrade Your Drivetrain?

Add the Shimano TOURNEY MF-TZ510 7-Speed Freewheel 14–28 (No Spoke Protector) to your cart now for just €24.99 and enjoy crisp, reliable gear changes on every Dublin road and trail. Order today at Pedro Pedals for fast shipping and expert support.