The One Engines caster kit has 12 asymmetrical eccentric bushings useful for changing the caster and camber angles and it has been developed especially for the chassis of the various OTK Kart Group brands (such as Tony Kart, Kosmic Kart, LN Kart, Exprit Kart, EOS Kart, Gillard Kart and Redspeed Kart). How are they different from standard eccentric bushings? For the number of holes on their body, which are more (28 to 20) than those present on the standard ones of OTK chassis, allowing, therefore (with the same overall adjustment range), additional micro adjustments, useful to better refine the kart setup (0.25 mm for each "click" of the bushing from one hole to another). The different bushings of the caster kit, on the other hand, allow different adjustments of the caster angle (and are distinguished according to the number of dots engraved on their surface). Specifically: the "No castor" bushing ensures a neutral caster; the "DOT 1", 1 mm caster; the "DOT 2", 1.5 mm caster; the "DOT 3" 2 mm caster; the "DOT 4" 2.5 mm caster and the "DOT 5" 3 mm caster. By purchasing a caster kit by One Engines you get the following: 12 bushings, 6 per side (on each side the left mounting side is indicated with an "L" and the right with an "R") and two magnetic covers, to be placed above the bushings once installed, to conceal your setup from opponents. As for the installation on the kart, the eccentric bushings of the caster kit are ideal for spindles with eight-millimetre diameter screws, but they also easily adapt to those with ten-millimetre screws. Their price (about 414 Euros) could certainly be a significant barrier to the purchase of this product. It is also true that there are several winning teams that use them during the most important international karting competitions (such as those promoted by FIA Karting or WSK Promotion), provided that their use can have direct traceability to the victories that these teams manage to achieve.

N.B. The adjustment of caster and camber plays a fundamental role in optimising the kart setup, to go into more detail we recommend reading the following articles:

• Technique | The caster


• Technique | The camber


•  On-Track Technical Test |  Adjusting the caster. The on-track test


• On-Track Technical Test |  The camber


• Advice from the Experts |The effects of adjusting the del caster on a kart’s set-up


•  Advice from the Experts | All the secrets for the perfect adjustment of the camber


•  True or False |  6 quizzes on camber and caster adjustment (part 1)


• True or False |  6 quizzes on camber and caster adjustment (part 2)

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