Specialized uses different types of derailleurs. The most common are Shimano and SRAM. Each of these have different levels to them. The better the derailleurs the more expensive the bike.
Dura-ace 7800 10 speed, but it all depends on which drivetrain (Shimano, Campy or SRAM) you have.
Sure. There are two things that has to match, the number of gears, and the actuation ratio or the rear derailer. If the rear derailer is a Shimano, then it'll take a Shimano shifter no problem. If it is an SRAM derailer, then you have to figure out if it's the Shimano-compatible version or the 1:1 pull SRAM version. If it's long-pull SRAM, you'll need a long-pull SRAM shifter. Once that's sorted out, unhook shifter cable at derailer. Pull grips off bar, loosen pinch screw(usually Allen head) slide twist shifter off. Slide trigger shifter on, tighten pinch bolt. Slide grips back on. Install shifter cable. Adjust shifting. Done!
Depends. If you stay within the Shimano family RDs are usually interchangeable, but they need to have the same cage length to be able to take up tha same amount of chain slack. SRAM and Campagnolo (mostly) use another throw ratio and are usually not interchangeable with Shimano.
SRAM owns SRAM. SRAM also now owns Rock Shox, Avid and Truvativ through aquisitions.
Brands of gears: * SRAM * Shimano * Campagnolo * Microshift * Sturmey-Archer Brands of bikes equipped with gears frm someone of the above - too many to count. Bianchi, De Rosa, Specialized, Felt, Klein, Trek ASO
SRAM Corporation was created in 1987.
depends if the Sram is good!
SRAM is also referred to as Static random-access memory. SRAM is used memory which utilizes semiconductors and is used with electronics and other computer applications. SRAM features random access memory and data that is held statically.
They're two different manufacturers of bicycle parts, mainly gears(shifters, derailers, cassettes and chainrings/cranks, and brakes). Both have a range of quality/price levels. For the same money, the stuff is very similar in performance. some prefer one some prefer another.
No. That is, if you're referring to the newer internally-geared 7-speed hubs from Shimano (Nexus) and SRAM (S7). Both of these have seven internal gear ratios (like the old 3-speeds on steroids) and a coaster brake. They are installed using a single chainring at the cranks and a single rear cog. So no derailleurs needed. BTW, the Nexus (or its sibling the Alfine) hub from Shimano has been made in 4, 7, 8 and 11 ratios.
---SRAM--- Static random access memory (SRAM) is a type of semiconductor memory where the word static indicates that it, unlike dynamic RAM (DRAM), does not need to be periodically refreshed, as SRAM uses bistable latching circuitry to store each bit. SRAM exhibits data remanence, but is still volatile in the conventional sense that data is eventually lost when the memory is not powered. The term SDRAM, which stands for synchronous DRAM, should not be confused with SRAM.