OS3 Anchors
  Go hard into the corner and "Drop Anchor"
NEW and IMPROVED!     OS3 Anchors is an adjustable weight T-Jet front end set.  Innovative features include low set weight, minimal rotational mass, and a wide stance.   Anchors now feature a "Loose" design that decouples the brass weights and allows them to float for improved handling.   The bottom of the weights are now contoured to maintain a safe floating distance from the rails when the front tire diameter is maintained at .310" or larger.   Smaller front tire sizes may be used depending on the chassis and track rail heights.   The spacers have been resized to allow easier insertion of the axles and also to prevent shorting of the pickup shoes when lifting the rear tires during testing.   Tires are softer for easier installation and removal.   Anchors can be used in the long or short wheelbase position.   Three different weights are available.

3.6g when using a Tungsten axle
2.8g when using a HSS axle.
2.6g when using a Titanium axle.

Also NEW are the Deluxe Anchor Kits. These kits include all the parts of a regular Anchor set minus the tires.   Added are two different size Tires (2 each) and two smaller OD White Delrin Wheels.   These tires are different size than the normal ones included in the Anchor set.   This permits four different size ODs for each side of the front end.   This means you can stagger the front or set the front to the same height on each side but at four different heights without the need to grind tires.   Possible combinations are:

Big Tire on the Black (Big) Wheel gives a size of .327" +/-.001".
Big Tire on the White (Small) Wheel gives a size of .322" +/- 001".
Small Tire on the Black (Big) Wheel gives a size of .317" +/-.001".
Small Tire on the White (Small) Wheel gives a size of .312" +/- 001".

This permits quick, easy and definitive front end sizing right at the track.   No guessing what the tire size is.   Look at the Wheel color and the Tire Size and you know what OD you have and what direction to go to adjust the ride height.   If desired, the Tires can be ground down to make even more accurate sizes.   The Deluxe Tires and Small Wheels are also available in a Deluxe Anchor Wheel Upgrade Kit.

The basic Anchors set is provided with tires roughly .316" in diameter.

Note:   Solid Rivet Chassis are wider than open rivet chassis and require smaller width spacers.   Order Solid Rivet Anchors for these chassis.

OS3 Anchors are Fray, Quarrel, Ohio Cup, ECHORR and Challenge approved!!



OS3 Anchors:
2 Round Bottom Brass Weights
2 Delrin Spacers
2 Black (Big) Delrin Wheels
2 OS3 Tires
2 Retainers
1 Tungsten, HSS or Titanium Axle

Deluxe Anchor Kit:
2 Round Bottom Brass Weights
2 Delrin Spacers
2 Black (Big) Delrin Wheels
2 White (Small) Delrin Wheels
2 Big OS3 Tires
2 Small OS3 Tires
2 Retainers
1 Tungsten, HSS or Titanium Axle

Deluxe Anchor Wheel Upgrade Kit:
2 White (Small) Delrin Wheels
2 Big OS3 Tires
2 Small OS3 Tires
(Kits are the same for Open and Solid Rivet Chassis)

Spacers are used to lock the axle in all directions and keep the weight pushed out on the axle.   Locking the axle eliminates rotational inertia, increases acceleration, and reduces braking distance.   It also reduces friction loss as only the wheel rotates on the axle.   Zero lateral movement of the axle means constant and repeatable performance.

Weights are round bottom, triangular hanging type.   This unique shape fills the wheelwell space and keeps the weight as far out on the axle as possible.   Almost the entire weight is below the axle.

Wheels are designed to use OS3 flat surface front tires.   The small outer lip allows easy installation and removal of the tires.   They are designed to rotate freely between the brass weight and retainer.

Axle is either Tungsten, HSS (High Speed Steel) or Titanium.   Tungsten axles add 1.3g, HSS adds .5g and Titanium adds .3g.   All axles are precision ground to within .0002" of the aftermarket standard of .0635".

Tires are OS3 front tires.   Utilizing flat surface tires allows the maximum stance achievable.   It also permits easy size adjustments to get both front tires to rest on the track.





Anchors (Open Rivet Chassis)

Anchors (Solid Rivet Chassis)

Anchor Replacement Parts (EACH)




Precision Ground Axles

Full Width Axles 1 5/16"

Installation Procedures









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