higest harness slots?

[twingirls+1]

Which seat has the highest harness slots? Is it the Radian? I'm ideally looking for a convertible booster that has higher 5 pt harness slots than the Britax Marathons but one that also converts to use the seat belt positioner.

My twins heads are at the top of their Marathons and already on the top harness slot. They are only 3.5 and about 32 lbs, so we have a LONG way to go to get to 40 lbs.

	Britax car seats Britax International has been producing reliable child safety products for over 30 years. Not only does Britax have decades of experience creating car seats and other children's safety equipment, Britax has a long standing reputation as an industry leader and innovator. Britax International is headquartered in the United Kingdom, but Britax car seats are designed and manufactured at facilities in Germany, Austria, and the United States. In the summer of 2002, Britax strengthened their commitment to creating the safest car seats with the opening of a brand new, state-of-the-art crash testing facility in North Carolina. Britax car seats have a reputation around the world for being some of the safest, most reliable, and best designed child safety seats ever made. Ready to buy a Britax seat? Please support our sponsor!

	Convertible Car Seats Convertible seats are for infants and toddlers. The seat can be used as a rear-facing seats for younger children, and switched to a forward-facing seat on the child's first birthday if the child weighs at least 20 pounds. However, experts recommend keeping the child in a rear-facing position until he or she outgrows the weight or height allowed by the safety seat. Ready to buy a Convertible car seat? Please support our sponsor!

	Booster Seat A booster seat raises your child up so that the car's lap and shoulder belts fit correctly. The lap belt should fall across the upper thighs. The shoulder belt should go across the middle of the shoulder and chest. A booster seat is used for older children up to about 80 pounds. Some states have passed laws requiring booster seats for children up to age 8 or 80 pounds. Check your state's law. Ready to buy a Booster Seat? Please support our sponsor!

	Sunshine Kids Radian 80 or 65 - Click for more info If "the Sunshine Kid's Radian 80 convertible car seat is (probably) the only car seat you will ever need," the "probably" part of this statement comes into play when you directly compare the Radian 80 with the Britax Regent. While the Radian 80 has a very high weight capacity, the seat width is only 10" vs. the Regent's 14" seat. The Britax Regent may be a bit wider, but it is very bulky, is only forward facing, and does not fold like the Radian 80. Because the Radian 80 is so narrow, you can potentially put three of them side by side in the back seat. Three Regents side by side? Impossible.

[MnMadhouse]

If you want a harnessing seat that will convert to a booster later on, there is the Graco Nautilus--it will harness to 65lbs, then can be used as a backless or highback booster until around 100lbs. The next one would be the Britax Frontier which will harness to 80lbs, then booster to 100lbs. It's harness slots are not quite AS tall as the Nautilus. Both of these seats are forward facing only.

The Radian is a convertible seat which will RF to 35lbs, then FF to 65 or 80lbs, depending on which one you get.

The tallest, highest weight harnessing seat on the market is the Britax Regent. It will harness to 80lbs, but it will NOT convert into a booster later.

	Forward Facing Car Seats A forward-facing car seat is one in which the child sits facing the front of the car. The seat should be installed in the back seat of your vehicle. Most forward-facing only seats are for children above 20 pounds.

	Britax car seats Britax International has been producing reliable child safety products for over 30 years. Not only does Britax have decades of experience creating car seats and other children's safety equipment, Britax has a long standing reputation as an industry leader and innovator. Britax International is headquartered in the United Kingdom, but Britax car seats are designed and manufactured at facilities in Germany, Austria, and the United States. In the summer of 2002, Britax strengthened their commitment to creating the safest car seats with the opening of a brand new, state-of-the-art crash testing facility in North Carolina. Britax car seats have a reputation around the world for being some of the safest, most reliable, and best designed child safety seats ever made. Ready to buy a Britax seat? Please support our sponsor!

	Convertible Car Seats Convertible seats are for infants and toddlers. The seat can be used as a rear-facing seats for younger children, and switched to a forward-facing seat on the child's first birthday if the child weighs at least 20 pounds. However, experts recommend keeping the child in a rear-facing position until he or she outgrows the weight or height allowed by the safety seat. Ready to buy a Convertible car seat? Please support our sponsor!

	Booster Seat A booster seat raises your child up so that the car's lap and shoulder belts fit correctly. The lap belt should fall across the upper thighs. The shoulder belt should go across the middle of the shoulder and chest. A booster seat is used for older children up to about 80 pounds. Some states have passed laws requiring booster seats for children up to age 8 or 80 pounds. Check your state's law. Ready to buy a Booster Seat? Please support our sponsor!

	Britax Regent - Click for more info The Britax Regent is the safe way to carry your older and larger passengers, all the way up to 80 lbs. Known as the "king of all car seats," the Britax Regent will accomodate your little king or queen for far longer than traditional car seats or booster seats. The Regent features a large roto-molded shell, comfy extra-thick comfort foam, washable covers, Patented Versa-Tether™, flexible buckle LATCH system, patented HUGS™ system, and tangle-free polyester 5-point harness. Ready to buy a Britax Regent? Please support our sponsor!

	Highback Booster High back booster--A booster that has a high plastic back that provides some side impact protection and is required for vehicles with low seatbacks or no headrests. Most high back boosters can be used for children 3-10 years old AND 30-100lbs, but the minimum recommendation for booster use is 4 years old AND 40lbs.

	Graco car seats Graco is one of the world's best known and most trusted juvenile products companies. They started the entire juvenile products industry with an invention called the Graco Swyngomatic. Since then they have invented products that have changed the way that parents travel with their children such as the travel system, which has made it so parents can lock an infant car seat into a stroller easily, without waking their sleeping baby. Their Graco SnugRide Infant Car Seat is pretty much synonymous with the term “infant car seat” because of its safety and design features coupled with its affordability. Today Graco continues designing and developing top-quality products that inspire parents and keeps children safe. Check out the new Infant Safe Seat Step 1 and Toddler Safe Seat Step 2 for proof of Graco’s continued commitment to child safety. Ready to buy a Graco car seat? Please support our sponsor!

	Sunshine Kids Radian 80 or 65 - Click for more info If "the Sunshine Kid's Radian 80 convertible car seat is (probably) the only car seat you will ever need," the "probably" part of this statement comes into play when you directly compare the Radian 80 with the Britax Regent. While the Radian 80 has a very high weight capacity, the seat width is only 10" vs. the Regent's 14" seat. The Britax Regent may be a bit wider, but it is very bulky, is only forward facing, and does not fold like the Radian 80. Because the Radian 80 is so narrow, you can potentially put three of them side by side in the back seat. Three Regents side by side? Impossible.

[twingirls+1]

Thanks for the advice, but I know for a fact that none of those seats you mentioned will fit 3 across in my vehicle...what's where the problem lies.