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Can I Change My Car Wheels From 16 Inch to 18 or 20 Inch?

     A Complete Guide to Legality, Safety, Tyres, Fitment and Getting It Right Changing the wheels on a car is one of the most popular modifications people make. A larger set of alloy wheels can completely transform the appearance of a vehicle. A car that looks ordinary on standard 16-inch wheels can look much more aggressive and sporty with 18, 19 or even 20-inch alloys. But what happens if your car currently has 16-inch wheels and you want to fit 18 or 20-inch wheels? Follow Car Guru DIY Blog Is it legal? Will the car still pass its MOT? Will the larger wheels damage the suspension? Will the tyres rub against the arches? Will your speedometer become inaccurate? And perhaps most importantly:  how do you make sure the modification is actually safe? The short answer is that increasing wheel diameter from 16 inches to 20 inches can be possible, but you cannot assume that any 20-inch wheel will fit simply because the bolt pattern looks correct. The wheel, tyre, suspensi...

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Why Car Cup Holders Are So Annoying - And the Simple Fix Every Driver Should Know About

If you’ve ever bought a new travel mug, reusable coffee cup, or oversized water bottle only to discover it doesn’t fit in your car’s cup holder, you’re definitely not alone.

For something so simple, car cup holders can be surprisingly frustrating. Different manufacturers use different sizes, shapes, and positions, making it difficult to find one that works with all of your favourite drinks. Some are too narrow, some are too shallow, and others are positioned in awkward places that make reaching your drink uncomfortable while driving.

Why Car Cup Holders Are So Annoying

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The Common Problems with Car Cup Holders

1. They’re Too Small

Modern reusable bottles are getting larger. Popular insulated bottles and travel mugs often have wider bases than the average factory-fitted cup holder. As a result, drivers end up placing bottles on seats, in door pockets, or balancing them in unsafe locations.

2. Strange Shapes

Not all cup holders are round. Some manufacturers use square, oval, or oddly contoured designs that only accommodate certain cup sizes. Even if your bottle technically fits, it may wobble around while driving.

3. Poor Positioning

Many vehicles place cup holders behind the gear stick, under armrests, or in locations that are difficult to access. Larger cups can even interfere with gear changes or dashboard controls.

4. Lack of Stability

Nothing is more annoying than hearing your drink tip over during a corner or sudden stop. Poorly designed cup holders often fail to secure larger cups and bottles properly.

The Simple Solution: Cup Holder Expanders

Fortunately, there’s an easy and affordable solution: Cup Holder Expanders.

A cup holder expander is an accessory that fits into your vehicle’s existing cup holder and creates a larger, more secure space for bigger bottles, travel mugs, coffee cups, and insulated tumblers. Many models feature adjustable bases that expand to fit different vehicles, while flexible grips keep your drinks securely in place.

For drivers who regularly carry large water bottles, takeaway coffees, or reusable mugs, a cup holder expander can completely eliminate the daily frustration of incompatible cup holders.

Recommended Cup Holder Expanders on Amazon UK

1. Amazon Basics Car Cup Holder Expander

A simple and reliable option with an adjustable base designed to fit many different vehicle cup holders. It works particularly well with larger reusable bottles and travel mugs.

Product Link:
Amazon Basics Car Cup Holder Expander on Amazon UK

2. JOYTUTUS Cup Holder Expander

One of the most popular options for oversized bottles. It features an expandable base and stabilising tabs that help keep larger drinks secure while driving.

Product Link:
JOYTUTUS Cup Holder Expander on Amazon UK

3. Swigzy Car Cup Holder Expander

Designed for larger bottles and travel mugs, the Swigzy expander uses a twist-to-expand mechanism that fits a wide range of vehicle cup holders.

Product Link:
Swigzy Cup Holder Expander on Amazon UK

Final Thoughts

Car manufacturers have never agreed on a standard cup holder size, which is why so many drivers struggle to find a secure place for their drinks. Whether your cup holder is too small, poorly positioned, or simply incompatible with modern bottles, a cup holder expander offers a quick and inexpensive fix.

Instead of changing your favourite bottle or constantly dealing with spills and wobbling drinks, a quality cup holder expander can make your daily commute, road trips, and long journeys far more convenient.

If your current cup holder is driving you crazy, this simple accessory might be one of the best upgrades you can make to your car.

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