Topeak
I have used this pump for years and they work fantastic for 2 or 3 years but then fail to provide pressure. I have replace the inner rubber O-ring (using both #12 and #13 sizes) and greased the O-ring but there must be something else that wears out. Perhaps, it is the 1 way valve at the bottom of the barrel where the hose connects. So in years past, off I went to buy another TOPEAK ROAD MORPH. I wish there were some way to rebuild this pump. My next pump will be a different brand.
I'm definitely not a pro mechanic but ride 15k miles/year and keep my local shop's wrenches plenty busy :-)
That said, lots of basic maintenance and repairs can easily be done at home, though some require special tools. A lot of bolts should be tightened to very specific torque for safety and performance. This is especially common where carbon components are involved to avoid cracking. So us home mechanics either have to use basic tools and go with gut/feel, or upgrade to torque wrenches. That's usually expensive.
These products (multiple preset torques offered) are a great option--the fixed torque is less flexible that professional tools, but is therefore simpler to use and these are offered in the most commonly needed torques. I don't need them very often, but at this price it's nice that I can have them in the tool box and save an occasional trip to the shop.
After several false starts with other brands, the Topeak fenders finally did the job. I put these on an All City Super Professional (700X28) with disc brakes and lots of clearance and eyelets. The only reason this isn't four starts is the frame mounting bracket for the rear fender is on the thick side and can't be slanted enough to make the rear fender as flush as I'd prefer. Not a showstopper, just a bit annoying. Overall, less than 20 minutes to install and ride quietly and solid on the bike.
