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TKART magazine How To | Wildkart tool used to insert spacers on the stub axle of the kart when adjusting the track width: is it really useful? the definitive review and the opinion of the expert mechanic
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WILDKART TOOL USED TO INSERT SPACERS ON THE STUB AXLE OF THE KART WHEN ADJUSTING THE TRACK WIDTH: 

IS IT REALLY USEFUL? THE DEFINITIVE REVIEW AND THE OPINION OF THE EXPERT MECHANIC

Michele Panzera
17 June 2024 • 8 min. read
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Introduction

While browsing through online stores specializing in the marketing of karting accessories and tools, it is common to come across tools specifically designed – and advertised – to enable very quickly, various kart setup operations (even the seemingly simplest ones that are usually done by hand). Amongst these, one category that caught our attention is that of tools that have the specific function of facilitating the insertion of spacers on the stub axle when adjusting the front track width (for more information, see “Doctor TKART | Adjusting the track width”). In fact, this is precisely one of those procedures that are usually done manually, both by professional mechanics and amateurs. In order to understand how these tools work (since there are no specific instructions in the stores where they are available), evaluating their actual abilities and understanding which type of kart driver (expert, practitioner or beginner) they can be used as an advantage, we tested one of these spacer inserters – specifically one manufactured by Wildkart – on the track. We submitted for evaluation to Michele Zampieri, a highly experienced mechanic and co-owner of CKR, an Italian company that manufactures chassis for Racing karts and has a racing department that participates in national and international single-brand competitions (such as the ROK Cup Challenge) and are periodically involved in international multi-brand events (such as CIK-FIA and WSK competitions). What was Zampieri’s assessment? Are these really useful tools? Additionally, are they worth the purchase price of around 30 euros? Here is what we have found out…

Editor’s note
What is the effect of the front track width adjustment on the kart? When should it be adjusted to improve its overall performance on the track? To learn more read these articles:

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On the right, some tools that are available in online stores. Their price is around 30 euros.
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On the left is Michele Zampieri. On the right, we tested the spacer inserter on a CKR Blue Shark chassis in a Direct Drive configuration, equipped with CKR aluminum front hubs and stub axles with a 25 mm diameter spindle pin.
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Tools for inserting spacers on the stub axle are useful if one needs to adjust the front track width of a kart with hubs that require spacers to make the adjustment. On the other hand, some Shifter karts (such as those produced by CRG and IPK), are equipped with hubs that slide in the disk hub installed on the stub axle (since they also feature a front-axle brake system). In this case, to adjust the front track width, simply slide the hub using a specific measurement then lock it in by tightening a screw. This eliminates the need for a spacer inserting tool. On the left of the photo is a CRG hub (without spacers) while on the right is a Birel Art hub where the presence of spacers is clearly visible.
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