New Bike Assembly Guide: Step-by-Step Instructions for Every Rider

Whether you've just purchased a bike from The Bike Affair or you're assembling a new bicycle for the first time, this guide will walk you through the process step by step. Our goal is to make assembly as seamless and enjoyable as possible so you can get out on the road quickly.

Tools You'll Need

Before you begin, gather these essentials (most are available in our Birzman and Park Tool range):

• Scissors or box cutter
• 4mm, 5mm, and 6mm Allen keys
• 15mm pedal wrench or open-end spanner
• Torque wrench (recommended for carbon components)

Step 1: Unbox Carefully

Remove the bike from the box, cutting zip ties and protective wrapping carefully to avoid scratching the frame. Lay out all components and check them against the packing list. Most bikes from The Bike Affair arrive 85–90% assembled.

Step 2: Handlebar Installation

Using a 4 mm allen key, remove the four bolts from the stem. Align the handlebar as demonstrated in the video and secure it by tightening the bolts one by one. Don't worry about perfect alignment at this stage; just ensure the handlebar is securely in place.

Handlebar Alignment

Once the handlebar is installed, fine-tune the alignment so it's perfectly centred and level. Stand in front of the bike and sight along the top of the handlebar — it should be perpendicular to the front wheel. Tighten the stem bolts evenly in a cross pattern to the manufacturer's recommended torque (typically 4–6 Nm for carbon bars).

Step 3: Front Wheel Installation

Using a 6mm allen key, unthread the thru-axle from the fork and remove the brake spacer from the brake caliper, keeping it safe for future use. Guide the wheel into place, ensuring the rotor fits between the brake pads, then secure the wheel by screwing in the thru axle firmly by hand. Aim for a torque of 5-7 Nm.

Step 4: Seatpost Installation

Insert the seatpost to your desired height. A good starting point: when sitting on the saddle with your heel on the pedal at its lowest point, your leg should be almost fully extended. Tighten the seat clamp bolt. For carbon seatposts, apply carbon assembly paste and use a torque wrench.

Step 5: Install the Pedals

This is where many new cyclists make a mistake. Remember: the right pedal threads clockwise (normal), but the left pedal threads counter-clockwise. Apply a thin layer of grease to the threads. Hand-thread first to avoid cross-threading, then tighten firmly with a pedal wrench. If you're using clipless pedals, check out our Giro and Northwave cycling shoes for compatible options.

Step 6: Check the Brakes

Squeeze both brake levers firmly. The pads should engage the rim or rotor well before the lever reaches the handlebar. If brakes feel spongy or don't engage, adjust the cable tension using the barrel adjuster. For hydraulic disc brakes, if the lever pulls to the bar, the system may need bleeding — contact us for assistance.

Step 7: Check Tyre Pressure

Inflate tyres to the pressure range printed on the sidewall. Road bikes typically run 80–100 PSI, hybrids 50–70 PSI, and MTBs 30–50 PSI. Keep spare Schwalbe tubes handy for your first rides.

Step 8: Install Accessories

Mount your lights, cyclocomputer, water bottle cages, and any bags. Test all electronics before heading out.

Step 9: Final Safety Check

Before your first ride, do a quick ABC check: Air (tyre pressure), Brakes (front and rear working), Chain (lubricated and running smoothly). Give every bolt a final check, especially the stem, handlebars, seat, and axles.

Need help with assembly or have questions? WhatsApp us or visit our store in Kondapur, Hyderabad. We're happy to walk you through any step or handle the full assembly for you.