Rennen Pentacle Chainring-5-Bolt seats Hardened and Plated reinforced steel

Hardened and Plated reinforced steel backbone

The Odyssey Pivotal Seat Post is only compatible with Pivotal style seats and is made with the traditional pivotal design

They have open ends to accommodate end plugs and are sold in pairs

Welded end caps to reduce flex

which will fit 3/8 drop-outs

Rennen Pentacle Chainring-5-Bolt seats Hardened and Plated reinforced steelThe Rennen Pentacle Chainring 5 Bolt is made from airplane grade 7075 T6 aluminum alloy which is 83 percent stronger than the standard 6061 T6 chainring. This premium alloy is also super lightweight so even the 42T size weighs less than 2. 5oz, one of the lightest out there. Rennen designed these cogs with a single speed specific tooth shape for added durability and the spline interface is 3 16" thick to protect your hubs. These 110mm BCD chainrings