Dolvitrny Bike Chain Guide for Brompton Folding Bike, Adjustable Polymer Chain -Stabilizer & Keeper, Anti-Drop Device with 21-23mm Spacer, Black

Details

• Complete Kit Includes 1 Chain Retention Device: Everything needed for immediate setup-no extra parts required. Check your bike's chain-to-frame spacing (21-23mm) and match to FOR folding bikes or compatible models.
• Reinforced Polymer Construction: LONGLASTING black polymer resists abrasion and during urban commutes, rides, and frequent folding/unfolding cycles.
• 4-Position Height Adjustment: Fine-tune fit varying chainring diameters-perfect for riders customizing drivetrains or upgrading components.
• Stable Chain Guidance: Minimizes lateral chain movement to reduce skipping, noise, and derailment on bumpy roads or tight turns.
• Tool-Free Mounting Options: Built-in backing plus zip tie holes allow secure attachment to seat stays or chainstays without drilling or permanent for modification.