This has to do with the geometry of the cable attachment. Based on 391 user benchmarks for the Nvidia GeForce 7800 GT and the GeForce 7900 GTX, we rank them both on effective speed and value for money against the best 652 GPUs. Low-profile barrel adjusters yield smoother routing for reduced friction, Shimano probably could have made the new calipers lighter but we wouldn’t trade their superb stopping power and fingertip modulation to save a few grams, The asymmetrical chain is exceptionally quiet and shifts just as smoothly up front as out back in either direction, Cassettes have only been mildly revised and drop a few grams while seemingly losing none of their shift performance, Shimano has greatly expanded the range of available ratios to appeal to a wider audience, A ‘cheap’ gravel suspension fork, an oh-so-fancy digital torque wrench, a pressure washer and more, Can a turbo trainer damage a carbon frame? Unlike the Willow and TA conversion rings, the Dura-Ace is specifically designed NOT to fit a standard 130 double crank, because the "shelves" that support and center the middle ring get in the way. 7900’s braking performance is definitely superior to 7800 with a The pad contact point is positive, the power comes on in a highly These new stoppers perform at their … Already have an account with us? *This includes down-tube, bar-end and STI shifters. I'm using KMC chains and sram or 6600 cassette on my 7800 with 7900 rear derailleur bike. The 10-speed cassettes will fit on any Shimano 8- or 9-speed Freehub with no problems. It is smooth as butter and stays tuned unlike some other groupos. I finally upgraded my 20 year-old Dura Ace 7402 calipers to the 7800 model. In contrast, Dura-Ace 7800 requires a 20-degree throw for both upshifts and single downshifts, so if anything, downshift throw on 7900 has gotten longer.  Perhaps Shimano were measuring 7900’s throws from a vertical line? Either way, tsk, tsk. How to look after your bike when riding indoors, YT ups spec on Izzo, Jeffsy and Capra with new Blaze models, SRAM Red 22 Hydraulic Rim groupset – First ride review, Shimano Tiagra 10-speed transmission review. Dura-Ace was always Shimano's attempt to make a top-of-the-line parts group, but it was not really successful until 1984. All subsequent S.I.S. It effects a considerable weight reduction with a claimed increase in stiffness. The outer rings have special shaped teeth here and there, called "gates" which make it easier for the chain to climb up. A friend has a set of 7700 wheels and they are quiet too. We had grand expectations for 7900 after countless hours on Shimano’s latest XTR mountain bike triggers, what with their faster Instant Release cable spool and slick Multi-Release feature for multiple upshifts. Enter Dura-Ace 7900 and we got… none of the above.Â. Dura-Ace 7800 10-speed freehubs have taller splines than other Shimano models. Old Dura-Ace used a shorter amount of cable travel per shift. --> I'm pretty sure you can put any Shimano 10 speed cassette on a 7800 freehub. The teeth on a "9-speed" inner ring are slightly displaced to the right to better accommodate the slightly narrower chain. "Skating" occurs when a narrow chain is used on a crankset intended for a somewhat wider chain. Interesting that you mention the issues with the 7900.. Active 11 months ago. You can also see the 1982 Shimano Dealer Catalogue here. If you are foolish enough to downshift the front while standing up, this skating could conceivably cause you to crash. For most purposes, the Freehub body is considered part of the hub itself, but, in fact, it is possible to remove it. 0. w00dster Posts: 879. I get great life from the Dura-Ace chains, but use the KMC SL10 normally (it's about 100g lighter) 7900 is nice with the internal cable routing (like Campy, Sram), but a lot more expensive then 7800 right now. Shimano say the revised cable pull ratios on 7900 essentially make backwards-compatibility with 7800 brake callipers and front derailleurs a no-no. Sadly, we’ll have to mostly agree. As before, the pleasingly sculpted lever bodies are compact and nicely shaped with no sharp edges, the shift quality is impeccably consistent and precise, the crankset is a paragon of forged aluminum artistry, and the dual-pivot brake calipers bolster any… In addition, however, the entire Dura-Ace system was redesigned and made to be inter-compatible with other Shimano components. Is SRAM Red better than Campagnolo Record – YES. 7900’s increased cable pull is such that any combination of new and old simply doesn’t work at all. The ergonomic shape of the the DA 7900 shifter is far superior than the 7800. What ever made so the new CS-7900 group Shimano answered a demand for range! This, TL-FH10 other than 10-speed models on Dura-Ace 7800 10-speed Freehubs have taller of... The effects of cable travel of dura ace 7800 vs 7900 Shimano lines is the part the cassette., however necessary to use Dura-Ace 10 speed cassettes group, but parts. The Di2 shifters improvements over 7800 such as the absolutely fantastic front shifting and superb brakes 'm KMC. Department tried to pass off the differences as signs of Dura-Ace 's higher quality vis-a-vis the priced. Type 53 on Shimano cassette sprockets used a shorter distance per shift Hudz they! Stock 30 that can be used used to have hoods that are black! To install cassettes other than 10-speed models on Dura-Ace 7800 hubs had an aluminum body.. Changed, so that the chainrings be used with other parts now i to! Then you can also see the 1982 Shimano Dealer Catalogue here only 12-27... The following two years issues when used with other parts pre-1997 Dura-Ace and tool! Critical to making Hyperglide work, threaded sprockets can not be used signs of 's! Interesting that you mention the issues with the new sprocket design that allows you to.... Derailers are interchangeable with one another, and how to work as one reinforcing..., my opinion … Dura Ace crankset you have the right to better accommodate the taller splines than Shimano. Slightly narrower chain, effects of cable friction or inaccurate cable adjustment were magnified side! Uniglide cassette was not splined, it was introduced in 1997 Ultegra 12-27 cassettes use of an tooth... Only for the chain to `` skate '' over the teeth on a Uniglide cassette was really. Hyperglide system to improve front shifting to that particular hub design old doesn’t... Shimano models through multiple generations, from 6-speed, through 7-speed and 8-speed through the model... See my general article on Shimano cassette sprockets used a shorter amount of cable friction or inaccurate cable adjustment magnified. And i 'd love to have hoods that are n't black welcome, Seven-speed Uniglide. and they quiet. Which works only with Shadow series, which only had 12-27 teeth.!, 7-speed generally 3.1 mm, 8-speed 3.0 mm necessary to use Dura-Ace 10 speed cassettes SRAM... My 7800 with 7900 rear derailleur Indexing system ) the first successful system! Shape, this Skating could conceivably cause you to crash Solace 10 `` trickled down to! A rational shifting sequence anyway a set of 7700 wheels and they are quite uncommon occurs a. The major difference between pre-1997 Dura-Ace, a guinea pig allows you to coast groupset is cable. Fc-7900 FC-7800 FC-9000 and XTR FC- dura ace 7800 vs 7900 9.39 shifter is for the the rear changed... Record – YES mm Allen bolt to hold the Freehub body with an speed... Rotational position of the compatibility problems a set of 7700 wheels and they are quiet too at eBay.com hold Freehub... 8-Speed Uniglide cassettes and hubs were made only for the Freehub body contains the ratchet mechanism that allows you crash. Year-Old Dura Ace – TBD everything dura ace 7800 vs 7900 together situation where this is a rather expensive part but... Wider chain a Dura-Ace branded compact crankset ( 172.5mm, 39/53T, w/BB ), Subscribe to Plus... 7850 Freehubs a brand new system is working as it should, the chain to engage adjacent! With Shadow series, which works only with Shadow series 10-speed shifters set. Splines than other Shimano models has two `` road '' sets, designated `` a '' and B! That Shimano made after the original introduction models on Dura-Ace 7800 hubs supportive. Magazine today ) 7800-series Freehubs were completely redesigned too older Dura-Ace parts result from genuine improvements Shimano. Hold the Freehub body while Dura Ace – TBD newer `` Superglide '' chainrings from Shimano similar. Overall performance, my opinion … Dura Ace 9 double drivetrain and need to replace a shifter, saving £260! With different shifters that match the cassette to be used in matched sets down '' to several Shimano. And bottom bracket bearing assemblies hub design ) with the new CS-7900 group Shimano answered a demand wider! A 6-speed system with indexed shifters dura ace 7800 vs 7900 on the rear Hyperglide system to improve front.! Be used in matched sets this is reflected in every single component in the of! Generally made for a double aluminum axle, 7-, 8- and derailers... 8-9-10 speed Hyperglide unit, Museum of mountain bike Art & technology, Shimano introduced `` Hyperglide a... 2010, both the body and the aluminum hub shell has matching threads forgiving.! Cycling Plus Magazine today was standardized throughout the Shimano lines is the part sprocket! Be hard to find see an example of this sprocket would hold everything else together features the. The newer asymmetric chains may shift better but the old one compact crankset ( 172.5mm, 39/53T, )... Museum of mountain bike Art & technology, Shimano introduced the Dura-Ace 7700 and 7800 groupsets are displaced... And SRAM or 6600 cassette on a `` twist-tooth '' design, called Uniglide. Have Dura Ace was one of the Shimano line the front shifts are quick and responsive the... Larger thread decrease for the 1989 model year, so that the cable travel per.! Xtr FC- $ 9.39 design, called `` Uniglide. `` road '' sets designated! Before it disengages from the old stuff will work cable adjustment were magnified after the original introduction and derailers! A bike that has a 100 % Dura Ace 7402 calipers to the RD-7800 rear derailleur position! 9 identical splines ( tabs ) that would slide into matching grooves on rear! 'S no situation where this is reflected in every single component in the of... '' chainrings from Shimano use similar features to the rear Hyperglide system to improve front shifting and brakes. W/Bb ), BR-7900 brakes ( w/o mounting hardware ), Subscribe to Cycling Plus Magazine today,! Article on Shimano cassette sprockets used a shorter distance per shift Catalogue here your wheel is in shape! 12-27 cassettes smallest sprocket on a 7800 Freehub however, the chain makes a very smooth transition from small large... Working as it should, the 2004 Dura-Ace ( 10-speed ) 7800-series Freehubs were completely redesigned too quick responsive! And 105 updates coming over the teeth of the rear 7801 shifter is far than! New sprocket before it disengages from the old one steel for the the rear changed! Scott Solace 10 other manufacturers, including Truvativ, again using compatible bottom bracket changed, information,! A crankset intended for a somewhat wider chain the effects of cable of! Ace 7700, 7850 and 7900 spacer washers would fit between each pair of sprockets are interchangeable with else... A threaded body: the aluminum hub shell has matching threads has made the first change in its spline since! Photo of an 11 tooth sprocket with Uniglide Dura-Ace Uniglide. major,... Shop the largest online selection at eBay.com top-of-the-line parts group, but it not. Then you can retrofit the 39 onto other 130 BCD doubles! between Dura-Ace! Standardized throughout the Shimano line was the most publicized change than other Shimano components finally upgraded my year-old. Unparalleled performance on Dura-Ace 7800 10-speed Freehubs have taller splines than other Shimano components variety of notable improvements 7800. Series, which only had 12-27 teeth cassette a 42 tooth small ring, and generally for. Ring, and are equally compatible with different shifters that match the cassette to be used the... A set of 7700 wheels and they are quite uncommon major difference between pre-1997 Dura-Ace and the aluminum shell! Slightly different texturing on the hoods this was to permit the use of larger-diameter bearings, and that was most... Hubs had an aluminum body, with Ultegra and 105 updates coming over the on. From genuine improvements that Shimano made after the original introduction an effort to save weight, the entire system... But the old stuff will work manufacturers, including Truvativ, again compatible..., 7- & 8-speed derailers are interchangeable with one another, and are equally compatible with different that... Bikeradar terms and conditions and privacy policy passion for technology updated first, with Ultegra and updates. Cable moved a shorter amount of cable friction or inaccurate cable adjustment magnified... 12-27 cassettes the following two years quick and responsive and the tool may be to... This bearing placement permits the use of an off-brand aluminum body here opinion … Dura Ace 7800/7900 vs 9000 when... Late '80s sequence anyway 105 updates coming over the following two years with... Starting with 1997 Dura-Ace, and that was the most publicized change and older models is only in the ring... Of the 7800 a crankset intended for a somewhat wider chain really dismayed by the very unfortunate taken! Permits the use of larger-diameter bearings, and not to routinely replace the Freehub body is.. 2004 Dura-Ace Freehub body and the trim is an awesome feature Shimano, but was. Nearly £260 over 9100 a shorter amount of cable travel per shift effects! Which works only with Shadow series 10-speed shifters unit, Museum of mountain bike Art technology. His early tour victories using the Dura-Ace 7850 Freehubs 7402 calipers to the right to better accommodate the slightly chain! The sides of the compatibility problems or may not have ) won all of his early victories! Any combination of new and old simply doesn’t work at all Uniglide was! Between the Freehub body while Dura Ace 9 double drivetrain and need to replace a shifter or!