Once you’ve got the basics down and a few tools in hand, there are some general lessons every mechanic eventually learns the hard way! If you’re in need of any more info about any of this, it’s likely to be very specific to the spec of your bike, we’re constantly updating our articles but google is always your friend!
It may sound obvious to a seasoned pro, but bike parts don’t all tighten in the same direction. Bottom brackets, pedals, and even some hub parts use reverse (left-hand) threads. Get it wrong and you’re at best money, at worst ruining your bike! Always double-check which way a thread runs before leaning on the wrench.
A worn chain will quickly ruin cassettes and chainrings. A cheap chain checker tool pays for itself many times over. Make checking your chain part of your routine—it’s the best way to know when servicing is due.
If you’ve just had a puncture on the roadside, emotions run high. Don’t trust a freshly patched tube as your only spare—it may fail under pressure. Always carry a tested, known-good tube. Save the patching for when you’re calm, indoors, with time and energy to do it properly.
Tubeless tyres are great, but they do need upkeep. Sealant dries out, valves clog, and rim tape can lift over time. Plan on cleaning and refreshing your setup regularly. If you want a true “fit-and-forget” approach, sticking with tubes might actually suit you better.
Not every bolt is “holding the bike together.” Many are for fine preload or adjustment to clamping parts that work through their own friction. Modern bikes often use lightweight alloys and carbon parts that don’t forgive ham-fisted wrenching. Stripped threads or bolt heads are heartbreakingly common mistakes and often are the tip of the iceberg of damage you may have already caused.
So what’s too tight? When in doubt, use a torque wrench—most common bolts are in the 4–8 Nm range, which may lighter than you’d expect.
If you don’t have access to a torque wrench , then at least stop picturing everything made of metal as “indestructable”, develop your “feel” for how much is enough.
Being a good bike mechanic isn’t just about knowing what to do—it’s about taking your time and knowing what not to do. These small lessons save time, money, and headaches. Build them into your habits early and you’ll avoid the classic beginner pitfalls.