Bike FAQ: Everything You Need to Know Before Buying a Bike

Are you thinking about buying a bicycle but don’t know where to start? Do you have doubts about which type to choose, how to measure the size, or how to maintain it over time? In this FAQ guide from the Cicli Sergio Bianchi Firenze team, you’ll find answers to the most frequently asked questions about the world of bicycles.

What is the difference between a city bike and a mountain bike?

The city bike is designed for urban use: upright posture, smooth and fast wheels on asphalt, often equipped with fenders, racks, and lights. It’s ideal for daily commuting, errands, and city rides.

The mountain bike (MTB), on the other hand, is made for off-road terrain, trails, and rough paths: it has wide, knobby tires, suspension, and a more aggressive geometry. It’s less efficient in the city because the knobby tires create more friction on asphalt.

How many gears should a city bike have?

For urban use on mostly flat roads, 6 or 7 speeds are more than enough. If you live in a city with many hills, you can opt for 21 speeds. Single-speed bikes (or fixed-gear) are perfect for those who want simplicity and minimal maintenance on flat routes.

What is a vintage bike and why has it come back into fashion?

A vintage bike is a bicycle with a design inspired by classic bikes from the ’50s to ’70s: steel frame, leather or spring saddle, raised handlebars, pastel colors, and detailed finishes. They have come back into fashion because they combine timeless aesthetics, riding comfort, and a strong visual identity. They are perfect for those who want to ride in style around the city.

What is an e-bike and how does it work?

An e-bike (electric pedal-assist bicycle) is a bike equipped with an electric motor that amplifies the rider’s pedaling power. It doesn’t move on its own: the motor only activates when you pedal, making hills and long distances much easier. The battery charges from a power outlet and offers a range between 40 and 120 km depending on the model and level of assistance chosen.

What is the difference between 26", 27.5", and 28" wheels?

The wheel diameter affects comfort, speed, and handling:

• 26" — more agile and maneuverable, ideal for compact city bikes and shorter riders
• 27.5" — a compromise between agility and rolling efficiency, common on modern MTBs
• 28" — greater rolling efficiency and speed on asphalt, ideal for city bikes and trekking bikes for adults

How do you measure bike size?

Size is measured based on your height. For city bikes with 28" wheels:

• 150–160 cm → size XS/S
• 160–175 cm → size S/M
• 175–185 cm → size M/L
• 185–200 cm → size L/XL

For a complete guide with a detailed size chart, read our article How to Choose the Right Bike Size.

How much does a good city bike cost?

A good quality city bike for daily use costs between 170 and 500 euros. Above 260 euros, you enter the premium segment, with lighter materials (aluminum) and branded components. For e-bikes, prices generally start from 1,000–2,500 euros.

Steel or aluminum frame: which to choose?

Steel: heavier but offers a smoother and more comfortable ride, better absorbs vibrations. It’s the classic material for vintage bikes and traditional city bikes. Easier to repair if damaged.

Aluminum: lighter and stiffer, ideal for those who want a responsive bike that’s easy to carry. It’s the most common material in modern city bikes. Less comfortable than steel on rough roads.

How often should bike maintenance be done?

For a bike used daily in the city, here’s the recommended maintenance:

• Weekly: check tire pressure and lubricate the chain if needed
• Monthly: check brakes, gears, and tighten main bolts
• Every 6 months / 1,000 km: full service by a qualified mechanic

Regular maintenance extends the bike’s life and prevents sudden breakdowns.

What is a quick link and what is it for?

The quick link (or master link) is a quick-release system for the bike chain. It allows you to install and remove the chain without special tools, in just a few seconds. It comes in different sizes depending on the number of speeds of the bike (1V, 6/7V, 8V, 9V, 10V, 11V). It’s an inexpensive and essential spare to always have on hand.

Folding bike: is it worth it?

The folding bike is ideal for those who combine biking with public transport, live in an apartment without space for a regular bike, or travel often. It folds in 20–30 seconds and can be taken on trains, to the office, or in the car. The trade-off is a slightly less stable ride compared to a traditional bike, especially at high speeds.

What is the best bike to explore Florence?

To visit Florence by bike, the ideal choice is a city bike or a vintage bike with 28" wheels. The historic center is mostly flat and the distances between main monuments are short. A bike with 6 speeds is more than enough. For those who want to climb up to Piazzale Michelangelo without effort, we recommend an e-bike. Read our guide What to Do and See in Florence by Bike for routes and practical tips.

How do I choose between men’s and women’s bikes?

The traditional distinction mainly concerns the frame geometry: women’s bikes often have a low-step frame that makes mounting and dismounting easier regardless of height. Men’s bikes have a high horizontal tube. Today, many unisex models eliminate this distinction. The choice depends on personal comfort, not gender.