Search results
Results from the WOW.Com Content Network
Head tube: the tube of a bicycle frame that contains the headset; Headset: the bearings that form the interface between the frame and fork steerer tube; Hood: the rubber brake lever covering on bikes with drop style handle bars; Hub: the core of a wheel; contains bearings and, in a traditional wheel, has drilled flanges for attachment of spokes
The larger diameter of the head tube and headset gives added stiffness to the steering portion of the bicycle. Common sizes. 25.4 mm (1 in) steerer tube, this may have a fork crown (the base of the fork steerer tube) of a number of different dimensions, and milling may be necessary to make some headsets fit. 26.4 mm crown race (ISO standard)
Some Santana tandem bicycles used a cable from lever to a master cylinder mounted near the head tube, with a hydraulic line to the rear wheel caliper. Such "hybrid" designs allow the leverage of a hydraulic system while allowing use of cable brake levers, but may be heavier and can suffer from grit intrusion in the standard cable.
Valves stop (or regulate) the flow of liquids or gases. They are categorized by application, such as isolation, throttling, and non-return. Isolation valves temporarily disconnect part of a piping system to allow maintenance or repair, for example. Isolation valves are typically left in either a fully open or closed position.
A separate airtight inner tube enclosed by the tire supports the tire carcass and maintains the bead lock. An advantage of this system is that the inner tube can be easily accessed for a patch repair or replacement of the tube. The ISO 5775-2 standard defines designations for bicycle rims. It distinguishes between Straight-side (SS) rims
A Assuming an altitude of 194 metres above mean sea level (the worldwide median altitude of human habitation), an indoor temperature of 23 °C, a dewpoint of 9 °C (40.85% relative humidity), and 760 mmHg sea level–corrected barometric pressure (molar water vapor content = 1.16%).
A thermostatic radiator valve on position 2 (15–17 °C) Installed thermostatic radiator valve with the adjustment wheel removed A thermostatic radiator valve (TRV) is a self-regulating valve fitted to hot water heating system radiator, to control the temperature of a room by changing the flow of hot water to the radiator.