The Problem Solvers Braze-On Front Derailleur Adapter simply clamps onto your frame's seat tube and provides a secure place to bolt on your braze-on front derailleur (sold separately). This fine adapter is made of light, durable aluminum and includes a stainless-steel bolt.

Problem Solvers' Braze-on Light mount threads into your fork or fender eyelets, allowing you to mount lights or accessories. It's lower position is great for getting your light closer to the ground for better visibility.

The Problem Solvers Clamp-On Cable Guides are for clamping on the rear brake cable housing on your frame when the frame doesn't have provisions for holding a full-length brake cable housing. You get 3 stainless-steel clamps and the nuts and bolts for them.

• Allows the use of downtube shifters on bikes without downtube shifter braze-ons • Compatible with 9/10-speed Shimano shifters • 31.8mm clamp with shims for 28.6mm tubes • Shifters not included

The Problem Solvers Double Barrel Brake Lever lets you operate 2 brakes with this one brake lever. It comes in a Right and Left version and is made of light, durable aluminum with a steel clamp bolt and aluminum adjusting barrels.

Technical Details: • Spaces rotor outboard for mounting 135mm REAR spaced hubs on 135mm FRONT spaced forks • 4.8mm thick, includes longer mounting bolts • One-piece alloy spacer, anodized black

The Problem Solvers Handlebar Clamp Shim allows you to fit almost any handlebars in almost any stem. It's machined of light and durable aluminum and grooved on the inside to hold tightly.

The Problem Solvers Inner Chainring Bolts include 5 of the special threaded chainring bolts that fit into the chainring nuts on your crankset to hold the chainrings in place (chainring nuts sold separately). This type is 8mm long and made of light, durable aluminum.

The Problem Solvers Seatpost Shim is what you need when your seatpost is a little too small-diameter to fit tightly into your frame. It's made of light, durable aluminum and has a lip on the top so it won't slide down inside the frame during installation.

The Problem Solvers Sheldon Fender Nuts are an awesome way to avoid the brake-centering problems caused by mounting fenders directly to your brakes. They're named after the inventor and bike guru, Sheldon Brown. These special Sheldon nuts take the place of your existing brake nuts. They have threaded extensions for standard 6mm bolts (sold separately) providing a secure mounting place for your fenders that won't mess with your brake adjustment. They make it easier/faster to install and remove fenders, too, so they're great for commuting bicycles.

The Problem Solvers Universal Derailleur Hanger is a handy thing to keep on hand (and even bring on epic off-road rides or extended tours) because it makes it relatively easy to fix a damaged/bent derailleur hanger, which is a pretty common breakdown. This CNC-machined 6061-aluminum hanger takes the place of the drive-side quick-release nut providing a straight hanger to mount your derailleur to. You'll still be able to shift into many of your gears, too.

The Problem Solvers Brake Boss Plugs are perfect for when you've removed your cantilever or linear-pull brakes in order to run disc brakes or a fixie setup. These plugs thread into the empty frame bosses and lend a clean look, while also protecting the threads inside the frame from corrosion.