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SPF1721K - Castor Correction Bush Kit

Original price - Original price €75,10
Original price
€75,10
€75,10 - €75,10
Current price €75,10
OEM Part
OEM: Made by an Original Equipment Manufacturer. This part is made by an original equipment manufacturer or under their license, ensuring compatibility and quality.
Brand Dobinsons
Castor Correction Bush Kit - offset polyurethane bush set for the front radius arm to differential mounting.

The bushes are made with an offset (eccentric) bore, so fitting them rotates the axle relative to the radius arms and restores castor angle lost when a suspension lift raises the ride height. Up to 2 degrees of castor increase is available, correcting the vague steering feel, wander and weak straight-line self-centring that follow a lift.

Polyurethane also resists the deflection and progressive collapse of the original rubber bushes under axle wind-up, holding the axle location more consistently under braking and off-road articulation.

This kit contains 4 polyurethane bushes, 4 steel tubes, 4 sleeves and a fitting instruction sheet.

Alternative Codes
SPF1721KSPF1721

Available to order 2–3 weeks

Not currently in stock. Order now — typically ships within 2–3 weeks.

Need it faster? Contact us about express import (2–5 business days).


When will my order arrive?

This item is ordered from our supplier on request. Typical lead time is 2–3 weeks from order confirmation.

  • Netherlands / Belgium / Germany: 2–4 working days after dispatch.
  • Other EU countries + UK: 4–8 working days after dispatch.
  • Outside EU/UK: contact us for an estimate.

Need it faster? Express import available in 2–5 business dayscontact us before ordering.

Job kits containing this part

This part is included in 0 job kit(s) below. Pick the kit that matches your vehicle and job, then add what you need.

Frequently asked questions

What does the SPF1721K castor correction bush kit do?
The SPF1721K is an offset polyurethane bush set for the front radius arm to differential mounting. The eccentric bore rotates the axle relative to the radius arms, restoring castor angle lost when a suspension lift raises the ride height, up to 2 degrees of correction.
What's included in the SPF1721K kit?
The SPF1721K contains 4 polyurethane bushes, 4 steel tubes, 4 sleeves and a fitting instruction sheet, enough to do the front radius arm to differential mountings.
Why fit castor correction bushes after a suspension lift?
A suspension lift changes the front axle geometry and reduces castor, which typically brings vague steering, wander and weak straight-line self-centring. The offset bushes restore castor angle so the steering feels planted again after a lift.
What's the advantage of polyurethane over rubber bushes?
Polyurethane resists the deflection and progressive collapse that the original rubber bushes suffer under axle wind-up. It holds the axle location more consistently under braking and off-road articulation than a standard rubber bush.