UIM · Hull and handling

Aftermarket seat cover, UIM

UIM answers this part for 7 of its classes, and publishes no rule for it in 8 more. 2 of those answers permit the part outright and 5 permit it with stated conditions, leaving 0 that do not. 3 are inherited from a parent class the rulebook points at.

This page is UIM only, and the bodies do not agree. The same part under IHRA. Which one applies to you is decided by whoever sanctions the race you enter.

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This is one body's answer, not the sport's. You are bound by whichever body sanctions the event you enter. If you race more than one series, build to the stricter answer. The differences are set out in the rulebook comparison.

The 10 mm cover thickness cap sits in the GLOSSARY, not in the class rules - easy to miss and easy to measure.

Where it stands, class by class

15 classes, grouped where the same rule gives the same answer rather than listed one by one, because an answer that holds for a class usually holds for every class that borrows its rules. 3 of them borrow another class’s rules and are marked below; for those, the link to the parent class is read from the categories table rather than stated in the rulebook. 8 publish no rule for this part and name no parent to borrow one from, and are grouped together at the end.

What each answer below means

Legal, with conditions

Keep it, but measure it: the rules permit this part only inside stated limits.

Legal

Keep it. The rules permit this part in this class.

No rule published for this class

Unanswerable here. This class publishes no rule for the part and names no parent class to borrow one from, which is an absence in the rulebook and not a permission.

Legal, with conditions 3 classes

The cover may be changed, including covering seat and backrest as a single piece, provided the shape and dimensions are unaltered. The glossary caps aftermarket seat covers at 10 mm thickness and forbids altering the original shape.

• Runabout GP4 · 502.01
• Runabout Juniors GP4 · 302.01 · borrows another class
• Runabout Ladies GP4 · 302.01.01 · borrows another class

Legal, with conditions 2 classes

Cover may be changed. 10 mm glossary cap applies.

• Runabout GP3 · 502.02
• Runabout GP2 · 502.03.02, 502.02.02-11

Legal 2 classes

Free within the GP1 seat article.

• Runabout GP1 · 502.04
• Runabout Veterans GP1 · 302.01.05 · borrows another class

No rule published for this class 8 classes

No component rules are published for this class and no single parent class is named, so this part cannot be answered for it. That is an absence in the rulebook, not a permission.

• Endurance · 317.03
• Freestyle Amateur · 312
• Freestyle Free · 312
• Jet Raid · 317.01
• Offshore · 317.02
• Parallel Slalom · 313
• Ski Future Electric (SFE) · 302.01
• UIM Hydro-Fly · 900

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Aftermarket seat cover: if the rule your class applies reads differently to you, or the rulebook has changed since this was read, ask. We answer with the section we read it from, or that we have not read it. Ask a rules question.

Every UIM class · where the rulebooks differ · checks on parts the shop sells · how this site reads a rulebook.