The Problem Solvers Cable Doublers are made of light, durable machined and anodized aluminum and they are Teflon coated for a super-smooth cable pull every time. They come in two models. The first allows you to control two brakes with one lever. The second allows you to control one brake with two levers. Why? Well, there are myriad applications: tandems, cyclocross bikes, fixies, tricycles, recumbents, cycles for those with special needs, bike polo bicycles, those 4-person bikes you see on beach boulevards, and so on. You could even link both models of Cable Doublers together for the ultimate in redundancy!

ReMatch adapters are designed to integrate different generations of Shimano Brakes to Shimano Shifters. Rematch Adapter 1.1 connects Shimano I-Spec A/B shifter to I-Spec II brake. - Made from CNC Machined T6061 Aluminum - Anodized Black - No additional hardware needed ReMatch 1.1 is NOT compatible with Deore M610 or SLX M670 shifters

ReMatch adapters are designed to integrate different generations of Shimano Brakes to Shimano Shifters. Rematch Adapter 1.2 connects Shimano I-Spec A/B brake to I-Spec II Shifter. - Made from CNC Machined T6061 Aluminum - Anodized Black - Includes all necessary hardware for both I-Spec A and I-Spec B brake - No additional hardware needed

The Problem Solvers BB30/Press-Fit 30 Adapter Kit consists of DuPont Delrin (a tough, light type of plastic) pieces that allow you to use your external bottom bracket-style crankarms (24mm spindles, such as a Shimano Hollowtech II crank) with newer BB30 and Press-Fit 30 bottom brackets. Please contact us if you have any questions about compatibility.

These simple clamps allow riders to mount I-Spec II compatible shifters or dropper levers onto their bars without the otherwise-requisite Shimano I-Spec II compatible brake levers. Sold individually and can be used for either right- or left-hand side. - Hinged clamps for easy installation without removing other components - AL-6061, anodized black - 23 grams - For use only with I-Spec II compatible shifters or dropper lever

The Problem Solvers Head Tube Reducers resize your head tube to accommodate different size forks. These fine aluminum reducers are designed for traditional, external-cup headsets. Please contact us for any questions about compatibility with your bicycle.

The Problem Solvers Direct Mount Adapter gives you a place to install direct-mount Shimano and SRAM derailleurs. It was initially developed for standard mountain bike frames with 68/73mm wide bottom bracket shells, and is equally suited to fat/snow bikes, where their 100mm wide bottom brackets make front derailleur applications a little difficult. The adapter is made of light and durable 6061 aluminum.

The Problem Solvers GXP Spindle Adapter Kit lets you adapt a GXP crankset to a BB30 or Press-Fit 30 bottom bracket. It's used with the Problem Solvers BB30/Press-Fit 30 Adapter Kit, which is sold separately.

The Problem Solvers Chain Tensioner is a handy device that lets you cleanly install a derailleur on frames without a derailleur hanger. It's made of light and durable CNC-machined 6061 aluminum with steel hardware. It's designed for use with rear-facing horizontal dropouts and 10mm rear axles.

The Problem Solvers Cross Clamp mounts to the seat tube on your frame so that you can make your top-routed shift cables work with a bottom-pull front road derailleurs. This is a common setup on cyclocross bicycles. Choose the diameter that matches your frame.

The Problem Solvers Micro-Adjustable Headset Spacer goes on the fork (it requires 10mm of clearance on the steerer) and locks in place to retain your headset bearing adjustment. This makes it possible to run your fork and headset without a star nut or compression plug. This 2-part threaded component is made of CNC-machined aluminum with a small bolt for tightening, so it's light and durable.

MisMatch adapters allow users to mount Shimano & SRAM brakes and shifters on one clamp. MisMatch Adapter 1.0/1.1 attaches SRAM shifters to Shimano I-Spec-A or I-Spec-B brake lever clamps. MisMatch adapters and the ever evolving “standards” it attempts to integrate between SRAM and Shimano is a confusing subject. Shimano brake and shifter mounting options have changed a lot, going through four mounting systems from 2011-2016. Shimano components have a model number printed somewhere on the brake and/or shifter, and this is the best way to determine what you own and what adapter you need. MisMatch 1.0/1.1 fits Shimano brake levers:BL-M985, BL-M988, BL-M820, BL-M785, BL-T785, BL-M675, BL-T675, BL-M640, BL-M596, BL-M820-B, BL-M785-B, BL-M675-B, BL-M640-B, BL-M615, BL-M506 - Annodized Black

MisMatch 1.2 adaptors allow users to mount a SRAM MatchMaker shifter to a Shimano I-Spec-II brake lever clamp. - Installation hardware included - Anodized black - Sold each

Available in the most common sizes and thicknesses-in small or bulk quantities, Problem Solvers headset spacers help riders get their stack height just right. - Made from Aluminum, anodized or polished finish, without logos - 1-1/8" Diameter - S.H.I.S. Stem Clamp Diameter: 28.6mm

Available in the most common sizes and thicknesses-in small or bulk quantities, Problem Solvers headset spacers help riders get their stack height just right. - Made from Aluminum, anodized or polished finish, without logos - S.H.I.S. Stem Clamp Diameter: 25.4mm

The Problem Solvers Double Chainring Bolts include 5 chainring bolts and nuts that are 8mm wide. This is the right size for most double-chainring setups. These chainring bolts are made of either aluminum, stainless steel, or chromoly.

For riders who appreciate an elegant and streamlined setup, the Stem to Top Cap Tapered Spacer features a slight taper toward the top, allowing it to transition seamlessly to the Top Cap. - Anodized aluminum construction, no logos - Sold in packs of ten - 4mm outer diameter at base tapers to 32.5mm outer diameter at the top - S.H.I.S. Stem Clamp Diameter: 28.6

The Problem Solvers Backstop bolts onto the frame to provide two stops for your cable housing. It's made of light, durable CNC-machined aluminum with a stainless-steel bolt, and the stops are slotted for easy cable installation/removal.

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.

Problem Solvers Pog top caps are machined aluminum with a 5 or 10mm spacer integrated as one piece. This makes for a clean, finished look when mounting a stem below the top of the steerer tube. - Bolt not included - 10mm available with or without logo - 5mm available without logo only

The Super Booster rear hub spacer kit is designed to give your 148mm rear thru-axle hubs the extra boost they need to fit any 157mm frame.

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 Compression Plug for 1 1/8-inch Forks is for threadless aluminum and carbon forks. It fits tightly inside the fork and provides easy headset adjustment and a nice, clean look.

The Problem Solvers Double Chainring Bolts include 5 chainring bolts and nuts that are 8mm wide. This is the right size for most double-chainring setups. These chainring bolts are made of aluminum and feature dual-hex heads for easy, secure 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.

Sold individually or as part of Problem Solvers' 6-bolt adapter assembly, this lock ring is meant for use with Shimano Center Lock compatible hubs. - External splines; compatible with external bottom bracket tools - For use with 12 – 20mm thru-axles - Aluminum construction

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.

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 12.5mm long and made of durable chromoly.

The Problem Solvers Single Chainring Bolts include 5 chainring bolts and nuts that are 6mm wide. This is the right size for most single-chainring setups. These chainring bolts are made of either aluminum, stainless steel, or chromoly.

Problem Solvers' Cassette Cog Carrier (CCC) bolts on to a splineless single-speed cog to give you a wide, Shimano-splined cog to run on your freehub body. The wide profile won't damage your freehub body. Tech Details: Aluminum carrier with steel cogs